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.