I've had mine for 6 months now and I love them (2). The remote is a weak link. The battery doesn't hold the charge the way I would like it to. Even if you don't use it, it goes dead in 4 to 6 weeks. So I keep it plugged in to a USB charger all the time.
If you are worried about the remote going bad, ask Logan at RB how much an extra one would cost? It can't be too much. I have 2 fixtures, so I have 2 remotes and I readily admit that having a backup makes me feel more comfortable.
As for reliability of the fixture, EverGrow, the Chinese manufacturer, builds great led fixtures. They are huge in the plant, greenhouse, grow light market and have been in our market now for 6+ years. I bought their version of the RB Photon V1 before RB was even on the market. At nearly 6 years old I upgraded to the V2 because I changed tanks and my old 32" fixtures wouldn't fit a 60" tank. The 50" V2 works great and my tank is mostly sps. You can see how slim and clean the fixtures look.
And it works well with my corals (mostly newer frags as this tank is only 6 months old).