I have the Seedhouse SL1 and have been very happy with it. I have used it for 120 nights, in rain, single digit temps, high winds, and a snow storm that dropped 10" of snow overnight (that is a LOT where I hike).
The Fly Creek is very similar tent, but they made it shorter so it probably wouldn't work for me. If you are under six feet, it would probably make a great tent. I also prefer lots of mesh for here in the SE, but most new SUL double wall tents (is that a oxymoron) tend to use more nylon than mesh. I have seen two people weigh their Fly Creek one said 2lbs 5oz, the other 2lbs 4.86oz with 13 stakes (you only need 10) so it is slightly over spec. Those may just be bad examples though as my SL1 is spot on at 2lbs 13.22oz (listed at 2lbs 13oz).
Also, while I find the SL1 to be very roomy, I don't think it is a full 22sf. They Claim 42" at the head end and 90" length (to the point) which I verified, but they also claim 31" width where the point starts tapering back, but my tent only has 26.5" here. I assume others are the same.
I think it is a great step forward in UL tents, and I would be looking at it if they hadn't made it shorter. The design is bomb proof as long as you pitch it foot into the wind. It doesn't fix any of the problems with the SL1 (small door, vestibule, etc), but it builds on that designs strengths, and in a lighter package.
BTW: the BA tents are not made in Colorado or in the US for that matter. Like all mainstream tents, they are made in China, Korea, or Vietnam.