I have a small propane GOSM, bought the small unit because at the time I had an CharGriller offset w/sfb that I wasnt going to use once the football season and the cold Chicagoland weather hit. Figured propane would be set it and forget it and for temps & it was.
The small chip box was pretty useless imho. I replaced mine with a large cast iron pan and that helped extend the time the restocking the chips for smoke quite a bit.
Turned out good ABT's(crispy bacon) meatloaf, chicken( crisp skin) and butts.
Ribs not so good for my tastes, really had a bad impact on the texture of the meat imho. Almost like baking them in a gas oven(the electrics I have eaten ribs off of have the same issue if not worse) imho. Even with mods the smoke level of the food wasnt what I enjoy compared to a charcoal smoker.
Since I got my WSM @ X-mas the GOSM has sat unused while I have used the WSM probably 10 times.
Good unit, Ill use mine again in June when I need to do up about 100 ABT's, but then it will sit unused again.
Im glad I tried the GOSM, cant learn to much about bbq, and different smokers.
IMHO, if you have an extra $150 or so bucks to add another smoker to your collection, why not. If you are only going to buy 1 smoker to use, Id get a WSM.