I've had their NAS (Network Attached Storage) for about a year. It's been working fine, alas a bit slow, but that is to be expected over LAN. The initial firmware looked like a beta though. Thankfully within a month of me buying it, they released an improved firmware version. Customer support was generally good.
I don't know about their wireless products though. I'm also looking for a robust wired router that can handle large number of p2p connections without getting bogged down. Despite running the HyperWRT firmware on my WRT54G (v2.2, so it's an older one), and using lower QoS priority for p2p, regular Internet browsing still suffers a lot.