Yes, you should spend the $100 in gas to try the bike. I'm 5'9", and at first I felt the T900 was too tall for me. It's the slanted top bar, it's a bit deceptive. I did as advised above, removing the suspension post for the stoker (but I left the original seat as I sometimes have an adult stoker). I also put crank shorteners on the back and consider it a good investment. It really helped when I raised the seat 2 inches to install the trailer bike. At the moment DD is just a bit too short to peddle as stoker, but DS is fine (5-yo twins, both a bit tall for their age group).
Not a very flatterring picture, but here we are:
http://homepage.mac.com/ladelfe/Twin...CycleTrain.jpg
When we need cargo space, I hang our trailer on the trailer bike, making quite a train.
Catherine