Originally Posted by KJ43

I've used their factory install in the past on a GRX crankset and I've also purchased a GRX crankset with the power meter pre-installed.

The factory install was shipped back to me about 3 weeks after sending them my crankset and I was kept in the loop on what stage things were in for the most part. I found them responsive to email. The crankset with the pre-installed PM arrive a little over a week from date of purchase.

As an aside, my experience is that 4iiii customer service is excellent. I had been having issues getting a power meter to connect and was fiddling with the copper battery connector to get better contact and accidentally popped it off. I hit them up, sent in the broken power meter and crank. They just shipped me back a new crank and power meter no charge aside from the shipping cost to send them the crank.