I figured I would bring this one back up, as we just got a Garmin 2797LMT. Received it Friday from GPS City. I had sent them a question about whether or not you could skip waypoints, without turning around, and they said no, but gave a procedure to stop the route, and restart it at the next waypoint. After dealing with Streets and Trips horrible mapping, slow enough response to miss turns, and unintelligable text to voice on our last trip, we decided that it might be easier to have to do the missed waypoint restart than put up with the quickly becoming obsolete Streets and Trips, which will skip waypoints.
The beginning of the process was a total fiasco. Got it running, updated the operating software and tried to do the map update. Had to download a couple of special Garmin programs to do it, and then it ran for 9 hours of downloading and locked up and bounced out of the update. Tried again, same problem and time. Even worse, it deleted the original map, so the unit was now useless. Read up on the web and tried again, with everything Garmin shut off and a full battery. This time it got all downloaded, prepared, and halfway through the install before it stopped with an error after 10.5 hours. Read up on it some more and moved the USB cord to a powered USB on the computer, downloaded another, older, Garmin install program, and this time found the box that puts the map on the device and on Basecamp (the computer program that lets you preprogram like Google maps. It ran all night, downloaded OK, prepared fine, and then locked and errored at the install beginning, all after 12+ hours. Since the old program had a box that said "save install data on computer", that I had checked, I tried to restart the install portion, unsuccessfully. On a whim and prayer, I went back to original install program and said go get the update. It skipped the download and went right to prepare, actually finishing in about 30 minutes. Checked the Garmin, and the map was there. Checked the Basecamp software on the computer and no map. Tried again with same result. Back on the web forums and found out Garmin had decided to change how the download worked. If there is enough room on the GPS, it puts the map there, and will not put it on the computer. Many pi$$ed people as now you had to hook up the GPS to the computer to preplan a route, and deal with slow response of going through the USB. On another whim, I went back to the older install program, started it from scratch with "computer only" checked for the install. It went to the download step, but quickly switched to getting if from the computer, taking 20 minutes instead of 12 hours. It then blew right through the prepare and install, actually putting it on the computer. Finally ready to go after way too many hours of work.
Today I have been going through and learning the mapping and the Basecamp, which is a bit cryptic, but seems to do the job. One of the things I looked for was a text listing of the turns and distances that could be printed, as DW likes to follow along that way. When I printed it out, none of the drag and drop waypoints I had created showed up on it, where they always did on Streets and Trips. That worried me, because if you miss one, you would have to be able to find it, to be able to go to the next waypoint. I did another route putting in the waypoints manually, and they did show up on the list. I went to edit one of the waypoints, and it gave the option to change it to a "via" point. In all my reading, I had run across via points a few times, mostly in regard to the older models like Street Pilot. Folks said those units would ignore missed via points, but insist on going through waypoints.
All that got my interest, so I laid out a route using the drag and drop method, assuming they were vias because they didn't show up on the turn list. I intentionally made a spot where I could miss a couple of the via points, going off route for a little ways , and then back on route. It told me to turn to the via points, and when I didn't it tried to route me to them until I was back on route, and it then ignored them. Life was suddenly getting a whole lot better, and Garmin moved up a little out of the cellar. Either everyone who has tried this is a total putz, or this is a brand new upgrade that Garmin hasn't told anybody about. It is not all the hard to do, so I think the latter, as I am also a putz at this stuff.
So---as we sit right now, the 2797LMT looks like it will do just about exactly what we want, allow preprograming custom routes without getting messed up if a point is missed. It SHOULD also do a very good job of following the route between via and waypoints the same as they show on the computer as the Basecamp and GPS are alleged to use the same maps and calculation methods, so no freelancing, we hope.
What we gain over Streets and Trips is not running the laptop, hopefully much more up to date maps, lane assistance, voice commands you can actually understand, much faster calculations, and more other information if wanted. We lose the nice big screen (the GPS is 7" though) and one place program and navigate. We didn't go for the much more expensive RV model, as most we read said it was cumbersome to use and not very up to date. We will use the Verizon internet on the laptop for that kind of information.
Lots still to learn, and I still have to do the horrendous Basecamp and map downloads to the laptop, but things are looking a lot better than they did yesterday when we were about 10 minutes away from sending it back.
Need to get some test runs in before winter.