At the moment, my only small Torx set is a Husky, which is Home Depot's house brand. It's fine; none of the bits have stripped, twisted, or otherwise let me down. It's a decent, rather cheap, tool.
About 3 months ago I bought a set of Wiha conventional screwdrivers. Full sized with an assortment of Phillips and Slotted heads. When I got them and started using them, I was kind of amazed. The fit of the Wiha bits into fasteners is more precise than any other screwdriver I've ever used. The slotted in particular were sort of a revelation. I hate slotted screws. The bit always slips side to side and it never seems to fill up the slot correctly, so you don't have positive contact. It kind of click-clacks back and forth, which eventually leads to the slot getting mangled by the screwdriver.
Not so with a slotted screwdriver that actually *fits* the slot. The Wihas not only fit, but they fit tightly. They fit so tightly that in some cases I have to use a bit of force (not much) to remove the screwdriver from the screw! The first slotted screw I tried, I thought I had missed the slot. Because the turning of the screw was so easy that I thought I must be just turning the screwdriver in mid air, not even touching the screw. Nope. I was turning the screw alright. It just felt like nothing.
The Phillips are similar: Really positive contact with pretty much zero play or wiggle. They just fit the fastener head perfectly and turn it. Which, BTW, the handles are really ergonomic so they feel good and allow you to apply a LOT of force if you want or need to.
So I don't have any Wiha Torx or Hex drivers, but I'm after some eventually. The sets are expensive-ish, but really not too bad. That set of full sized screwdrivers I bought? About the same price as dinner for 2 at a middle of the road restaurant. The difference is, I'll have those screwdrivers forever; probably at least 20 years and maybe more.
In summary, two thumbs up for Wiha tools. I'm super impressed with mine.
Brian.