We upgraded, last summer, from a Burley Samba Softride to a Calfee Tetra Tetra. WOW! 15 lb. weight savings even with bombproof wheels, stoker shock-post and Look ErgoStem.
Kathy and I trade off captaining duties to the Look stem facilitates easy adjustments.
The Carbon ride is AWESOME.
The only nitpics we have are the limitation on the tire width we can run (700x26mm max.) due to the low clearance AME carbon fork, and the fact that Calfee didn't put on the cable stops we requested for our Arai drag brake.
Despite that we LOVE the ride.