I too have the dual burner Partner stove (came with my AT Horizon trailer). Have put it through its paces the past 18-months. It is a great stove but I have two nits:
#1: It would be nice when using it when the wind is blowing to have a wind screen. The wind screen is integral to the free standing stove but not apart of my slide out stove on my trailer. Not a big deal for me to fab something up though. And, again, if you are looking at the free standing version it comes with the windscreen.
#2: The pan grate is fine for larger pans but for small pots, espresso makers, etc. I had to weld a few SS cross pieces in to make it work better. Not a big deal if you have a welder but this is a design detail that Partner could remedy without much cost if any.
Other than that it is easy to clean and will last longer than me ;-)