It's been in daily service since I received it (Feb. 2019), and I never even notice it these days other than the relay click when it triggers on. It's a solid 8-channel amp built around a solid hypex module (x4), without any weird bells and whistles. The 12V trigger works, I've definitely managed to annoy my neighbors with it a few times, and to date I've had no technical issues other than that they didn't include US power cables (they're just normal IEC plugs, so I had plenty lying around anyway).
From a support perspective: when it originally arrived, there was some damage in shipping ("damage" is a strong word; the nuts affixing one of the Hypex modules came loose in shipping, probably from vibration, which knocked a few other things loose and required re-soldering one sheared wire). I was able to rectify the problem myself, but Tibor was very responsive and helpful; normally, I'd have had them perform repairs, but shipping back and forth from California to Austria just wasn't a reasonable thing to do, especially after there'd already been shipping damage. I have no doubt he'd have taken care of the issue properly and promptly if I'd have been unable to repair the issue, and he offered to pay for any costs associated with the repair (there weren't any, thankfully; just my time).
Anyway, tl;dr: I continue to be very happy with it, coming up on a year and a half in service, and would cheerfully order something from him again if I were in the market.