The one I have is the 'new as of last year's Canoecopia' Big Agnes Skyline UL.  The thing I like best about it over the comparable Helinox/REI models is that there are NO plastic knuckle joints - everything is metal.  That makes it more sturdy, less 'wobble' if you will.  Less likely to break, IMO and without that bulk, it weighs less and packs down smaller. Another thing I found is that you sit more upright in it, less reclined, which makes it easier to get up from and to do things like cook/eat while seated.  I had it out on both my Q trips last summer and LOVE it - performed flawlessly. 

The Big Six Camp Chair is the comp to the Helinox Sunset - same price point.  I imagine it has the same advantages over the Sunset. I looked at that one too, last year, but didn't want to carry the extra weight/size over the Skyline UL. If you decide to get one, wait til REI has a 20% coupon/sale and save yourself $30.

I also picked up the Woodchuck table over Xmas for the same reasons and plan on taking it on trail this summer as well.