I know, ratchets are always the most popular around here, so I'll start there. It's pictured with an old Husky (New Britain) to show the proportions. It's very similarly sized - the Triangle ratchet head measures 1.375" in diameter, and .981" deep, compared to 1.350" and .950" for the Husky. The Triangle is also about 1/4" longer. Personally I like the handle shape, the finish has more grip than polished chrome, the direction selector is easy to toggle, and the depression in the selector is easier than most for pressing the quick release button. Not surprisingly, the action is very fine. I'm used to 40-45 tooth ratchets, and while I don't think more teeth are necessary, they do give a nice feel to the ratchet. I may try some tool dip on the handle at some point partly for the look, partly for the grip, and partly so it's warmer to handle when the weather is cold. I also wondered why the selector doesn't have a triangular pattern forged into it? As to weight, it's about 20% heavier than the Husky, but the centre of gravity is a little further down towards the handle end, which I think is good.
Now for the sockets. To see how well the raised ridges work for finger spinning, I attached the sockets to a torque screwdriver, and applied torque with my fingers to the socket ridges. Unfortunately I couldn't get good reliable readings of where my fingers started to slip, but I would say the feature does give a bit more grip, and I think it would be quite noticable with oily fingers, but it's not any 2 or 3 times more grip, maybe 10-30%. Since a little extra torque when finger tightening is frequently useful, it's still a good feature. The size markings were also excellent - nice and large, properly stamped and not laser etched, and in 2 or 3 places around the socket. The standard thread size that corresponds to the socket is also engraved with the size markings - if you see the photos you'll see there's a triangle indicating M12 threads on the 19mm socket. Dimensionally, the 19mm socket measured 1.013" in diameter to the outside of the ridges, with the ridges being about .015". The socket is 1.228" high. For comparison, two other 19mm sockets in my box measured socket is 1.010" dia. by 1.021" high, and 1.003" dia. by 1.139" high. So the Triangle design doesn't seem to sacrifice too much clearance by having the gripping ridges.
Probably my favourite piece here is the U-joint. Normally I dislike U-joints, and avoid them whenever possible, always deferring to other tools or to a wobble extension first. This is the first U-joint that I actually like - the spring loaded design is a fantastic idea. I'll leave it to the career mechanics to confirm this, but I suspect that anyone who uses a U-joint regularly would find these worth buying. I've pictured it holding a 13/16" spark plug socket to give you an idea of the feel of the spring, and how it handles with a relatively heavy socket.
The extension is round with flat surfaces on two sides to turn with an 11mm or 7/16" open end wrench if you want a little extra torque when finger spinning. There is also a laser etched scale on the side, in millimetres, and the end has the gripping grooves like the sockets. I'm generally content with any extensions that have knurling on the shaft, but It would be interesting to have someone test out the Triangle extensions along with Toptul and Koken, for the best design. I do like the idea of being able to help turn with a wrench, but either a square or hex would seem more precise for that.
Finally, a few comments on finish. I think finish can be over-emphasized, as it doesn't necessarily reflect the strength of the steel underneath, and even an initially good finish may or may not prove to be durable and corrosion resistant in the long term. Even so, I have to say I was pleased with the finish. On all pieces it was nearly flawless, just a few minor marks on the ridges of the sockets which would have been left in the forging process. I haven't had much experience with satin finishes, but it's really nice - seems less slippery than polished chrome, and appears less likely to get marked up. I'll be looking for more stuff with this finish, whether it's on items from Triangle or elsewhere.
Overall I'm fairly impressed, seems like decent stuff to me. I wouldn't call most of it revolutionary, as it doesn't make my existing tools obsolete, but good markings on the sockets are a particular feature I look for. And the standout here is the U-joint.