I've had the SOL Titanium for a couple seasons now. It's been a good stove at all sort of elevations and temps for me. The only thing I don't care for about the stove is the lid comes off pretty easy if your not careful packing it or lashing it down with a rubber band or something similar. I kind of wish the lid design would lash down a bit better for packing. Other than that it's an awesome stove.
I use the smaller one that will pack inside the cup with everything else.
1 small cannister of fuel is good enough for a 8 - 10 day hunt above 11,500 ft. This use is based on morning and evening cooking with 14 ounces of water. Still had some fuel left on a couple occasions.
Used my Titanium this year and I averaged one 100g canister per week of use. That was with two uses a day. Great stove. All my time was between 8500-10500 ft.
I picked up a Zip last year and used it quite a bit. Longest trip was eight days, three to four boils a day.