The aluminum handles (bit holders) from ifixit are second to none. Really nicely made, and the ball-bearing caps on the ends are really useful. (Though such caps are common on precision screwdrivers — though often not as free-turning — they're unheard of on full-size drivers. I find it to be way more useful than expected.) Being solid aluminum, they’re inherently ESD-safe.
The ifixit bits, on the other hand, are nothing to write home about. The quality isn’t terrible, but they’re by no means premium bits. It’s a nice selection of bits, especially the security bits, but on my Manta set at work (my primary screwdriver), I quickly replaced the slotted and Phillips bits with top-quality ones from PB Swiss, Wera, and Wiha. (The 1/4”-drive ifixit slotted bits are borderline useless: the blades are too thick for a given blade width, forcing you to use an undersized bit.)