I have had a fair bit of bit-ratchet stuff, but never been super-happy with it. I loved my Icon 1/4" roto-head ratchet, and thought roto might be a plus in this application, so I got a Carlyle roto bit ratchet and it's... OK.
Saw the hype on Reddit about the Icon bit ratchet kit, and had just done a couple things where it would have come in handy, so I got one.
It has been awesome. The combination of a flex head and the pass-through extension has made this thing absolutely invaluable. I've used it far more than I expected.
For example: I was struggling to get to the back torx bolts on the PCV of the family Volvo. (the big plastic thing that says "febi" - this is actually the replacement part)
The roto was too bulky and fouled on the top of the engine bay (which also prevented the use of my straight bit-driver) or in one spot a fastener coming off the firewall.
Then I remembered I had the Icon kit. The slim head made getting under the top of the engine bay no issue. The pass-through let me avoid the fastener on the firewall and 'get down' a bit on a couple of the more-stubborn bolts. As soon as I broke it out, a PITA job became an easy job.
Very happy now with my setup:

I didn't think to take a pic of the roto there, but the head was too tall and too wide to be much help, plus the pass-through was a big help.
The T-handle also comes in extremely handy.
I got a set of
very-shallow 1/4" sockets from O'Reilley's to go with the kit: (shown here lined up roughly at the same 8mm-14mm of my Tekton set - my Icon and SK sets are roughly as tall):
So with this as my current kit, I'm feeling pretty good...
