Migrating over from Wink, with whom I had been with for years. They had made a lot of improvements, but ultimately it was just too limiting on the logic it could do. I had considered getting Smartthings, but I love Lutron products and ultimately it just didn't seem like there was enough difference to justify the switch. Apparently the jump to complicated logic and full local control pushed me over the edge for Hubitat.
The process was pretty easy. I did a rolling change over - removing a few items from Wink and adding them to Hubitat. I was surprised that the Lutron Zigbee Remote didn't work with Hubitat, but the ability to use Pico's with a Caseta Pro hub made the Zigbee remotes irrelevant anyway. Getting my Zwave mesh up and going took a few tries - it seems that the range is less on Hubitat than it is on the Wink. That wouldn't be too surprising since the Wink has the antenna build into a larger device. Once the mesh network was up, my coverage increased and it didn't matter anyway. All it really meant was I had to move the hub around to get some of my zwave outlets that were wired in the wall.
The speed difference isn't actually that much better, as Wink had been implementing local control for quite a few devices. What I'm loving is Room Manager. I'm coming from the commercial world of advanced lighting control, where you have one sensor that has a 5, 15, or 30 minute shut off period. Having sensors with a 30 second timeout, and having the software use the amount of activity seen over a few minutes is a totally different way of thinking for me. It makes a lot more sense, particularly in a house. The only issue I run into is if I want the lights off while I'm in a space, as the system would keep turning them on every 30 seconds or so. I believe the solution is a button to disable the system in these situations, as they would be rare. Maybe one of those giant Fibaro red buttons that disables the whole house (for the WAF).
All in all I'm very pleased with Hubitat after a week of use, mainly due to the ability to use Pico switches and Room Manager.