Re: 2006 Gulfstream MB Cruiser
My first B was a Gulf Stream Vista Cruiser. It was a 2006 and it was the g24 with the middle bed and rear kitchen and bath. I owned it one month and traded it for a 2006 Roadrek RS Adventurous. I will not mince words I hated the Gulf Stream. It was poorly designed, and poorly constructed. It was however a very low cost point of entry and proved to my wife and I that we liked B style RVing enough that we were willing to put a fair amount of money into that hobby.
To your specific question regarding the refrigerator and water heater. If my memory is correct the 12 volt only refrigerator was very efficient. In fact I wondered why more converters did not use them. I do not recall, but the amp/watt draw was much lower than the three way refers. Now that having been said, I now have a 2013 GWV Legend SE with the large (huge by B standards) refrigerator. It is remarkably efficient with its use of propane. It seems to run forever on a propane fill.
I don not recall that the instant on water heater was an issue.
My main issue was the lack of useable storage. Also the model that we had had bulges in the upper rear outside of the coach to accommodate some interior mods that Gulfstream put in. I am not an aerospace engineer (but our daughter is) but it seemed to me that at highway speeds they created some turbulence that made passing or being passed by 18 wheelers a life threatening white knuckle experience.
Owning the Gulfstream for one month cost me a lot of money in depreciation when I traded it for the Roadtrek. I wish that I could have learned that lesson in a less costly fashion. Unfortunately for us we had never owned an RV, let alone a B and had no clue as to what features we would find important.
2013 Great West Van Legend SE