Bio-
Compared to other boats in its class, a small, trailerable, cruising sport trimaran, the Telstar is easily by and far the most affordable of them. The Corsair 28 doesn't even have standing head room for me, much less my 6' tall crew, and I'm only 5'4" or so. The Corsair 31 has about the same cabin room as the Telstar 28, at nearly twice the price. The Quorning Dragonflies are certainly the nicest of the folding trimarans, but cost significantly more expensive than the Corsairs, much less the Telstar 28.
Also, only the Quornings and the Telstar 28 are really designed as cruising boats. Most of the Corsairs, up to the 31, only come with a porta-pottie and camping stove. The Telstar 28 has an option for a refrigerator—an Engel M27, which I did get. It comes with a marine head and holding tank, which is a necessity if you sail on an NDZ like Buzzards Bay. It comes with a propane two-burner stove/broiler.
Granted, it's got some shortcomings. I wish the boat came with a bridgedeck, as the standard cockpit tends to get the interior of the boat wet when sailing in the 7-9' seas and 20-30 knots of wind like I normally do. I built a bridgedeck for mine, so not that isn't a problem.
I wish the boat had more stowage—a common problem on almost all the sport trimarans—since the bilge is two-inches deep, and there's little stowage in the cockpit lockers or under the cabin settees (in the case of the Telstar none) since they're basically right over the hull flare, so have very little depth below them. Adding the bridgedeck helped quite a bit with this problem as well.
The Telstar has done away with some of the problems in the Corsairs and Quornings. The folding system makes the boat a bit more stable when they're retracted—not as stable as with them extended, but you can motor with them retracted. The ama folding system doesn't require tools as they do on the Corsairs—dropping the wrench or bolts overboard when retracting or extending the amas on a Corsair would suck.
The mast raising system is much more reliable and can be done in about 15 minutes by a single person, either on the water or on the trailer. The Corsair system requires the trailer winch and several of the Corsairs I had looked at were being sold due to the dangers posed by dropping the mast, in one case more than once.
The Telstar and the Quornings can be stored in a single width slip. However, the Quornings require you to pay for a longer slip than the Telstar does, since the amas on the Quornings swing back and effectively lengthen the boat when retracted. This also makes steering a Dragonfly with the amas retracted a bit more awkward.
If money were no object, I probably would have gone with a Quorning Dragonfly. The fit and finish of the Quornings is very nice, and they have some features that I like and had to add to the Telstar. Given my budget and such, the Telstar was definitely the best option for me.
Personally, I'd love to see PCI come out with a 35-37' version of the Telstar 28. That would be an ideal cruising boat IMHO. I don't think it'll happen any time soon though.