Sandy Preiss wrote a review of Big Agnes Seedhouse SL1 Tent: 1-Person 3-Season on December 3, 2012
If a light solo tent is what you are looking for, this is a great choice. It is well designed and highly functional. If you do lots of solo backpacking trips, this would be a great piece of gear.
If you are serious about UL you can go a lot lighter with a tarp. If you usually backpack with a partner, splitting the weight and sharing a 2-man tent is more comfortable and lighter. But if you are an avid lightweight (not UL) solo backpacker and want to retain the creature comfort of having a tent, I don't think you'll beat the Seedhouse SL1.