My 0.02$ about PB Swiss tools
Can't comment on durability yet as I have not used them long enough to evaluate that.
Build fit and finish are second to none.
Absolutely love the swissgrip, can't comment on the other styles.
Machining of drivers/bits is excellent, very sharp, very well defined, very consistent.
I find Allen ends to be sharp and good fit, but they don't raise the bar from the (best) competition in terms of fitment.
I measured allen ends with a micke to be generally 0.02 to 0.03 below exact dimension (e.g 3mm allen will typically measure 2.97 to 2.98) which is very good, but not outstandingly tight. I've measured WERA Allens to be above that, granted, we're splitting hair at this point.
I dislike the rainbow colors, I think most colors don't look as good as the gorgeous vibrant swiss RED, some actually look pretty cheap IMO (the yellow comes to mind, as the black inner core is slightly visible through it). I stick with the original handles and I don't think I miss much in terms of size identification (not a pro).
The bits are impressively good.
The bits holder screwdriver is the tightest interference I have seen on a holder, bits have very little freedom to move, and the magnet is the most powerful I've seen too. Once the bit is in there, it feels like a solid driver.
The holding part is also interestingly shallow, so most of the bit is exposed, which can help clear a recessed screw in some case although a solid driver will always be better in that case.
Socket screwdrivers are very nice, the OD is rather oriented to heavy load stuff (slightly big), and the driver end is a little too tapered, that might be a problem on very low profile nuts (no issue whatsoever on normal nuts).
Identifications are laser engraved, and might disappear over time. Same for printed informations on the handles. Might bother some people who wear their tools to the bone, but I don't.
Anyway, superb stuff, and over here (Europe), it's not necessarily *that* much more expensive than other strong brand names that don't come close IMO (like FACOM drivers just to pick an example).
If you don't want to spend money I'd suggest to STAY AWAY from the brand, once you've tried it, you'll want to replace all your bits/drivers. They just look and feel that good.
edit : forgot to mention their metal T handles Allen driver, which are superb. I've seen Beta, Facom, KS Tools, none came close in terms of fit and finish in hands. Sizes 3/4/5/6/8 really come handy.