Still holding up well. I’ve used the latest beta 1.1.7.1 and keep the total gain at about 85% for now. Funny thing is as someone mentioned in the HF8 review thread, I notice when it is not turned on, but once it’s on, I almost forget that it’s there. Still wish there was more defined controls within their software and better triggers to feel seams in the concrete, but it’s better than nothing. As for the integration, I don’t know why NLR doesn’t offer it as standard or an option as the pad-on-seat did not fit together well at all.
Edit: also haven’t noticed any issues with heat, but most my flights are 2 hours or less.