I've been reasonably happy with Stairville lights, and while I do like the light colour and intensity of these, the failure rate is too troubling.
Thomann are always good with repairs, we have already now had to send back a few units including one for a second repair.
If you don't have easy access to your lighting locations, DO NOT consider these lights.
Pulling lights down and rehanging in our rig is unfortunately a big job. And I fear there's a high chance most will fail within a couple of years after the warranty expires - unfortunate.