I've had mine for about 10 months now, ~40 dives to a maximum of 30 meters, no serious issues. Shooting it with 10-18mm and 16-50mm lenses in 8" dome port and 90mm macro in telephoto port. The issues that I have encountered are, in no particular order:
- 10-18mm zoom ring requires very careful alignment - if it contacts the housing, then the teeth just slip when you turn the knob, but if you pull it too far back, then it fails to contact. Usually takes me a few tries as I seal the housing to get it right. It was recently suggested to me to use silicone grease on its front edge; I haven't yet tried that.
- Left fiber optic socket is not as good at transmitting camera flash pulses out of the housing as the right one - with my strobes (SeaFrogs ST-100 Pro) this sometimes causes one of the strobes to miss its pre-flash. I suppose it can be mitigated by using a double FO plug in the right socket, but I'm waiting for UW-Technics LED trigger to come out before buying new FO cables.
- SeaFrogs does not offer extension rings for the ports, so you can't customize port barrel lengths to suit various lenses' nodal points. 10-18mm and 16-50mm work well enough with their ports, but corners are still somewhat soft - I don't know whether a finer adjustment of port length would have improved that.
- There is no focus ring for 90mm macro lens, so it's AF-only. I might, at some point, get my act together and 3D-print one.
- They only sell a neoprene cover for 6" dome port, not for 8" dome. The latter comes with a cloth cover in the box, and I dived with it off a boat, but it doesn't offer much protection. I got a generic 8" dome cover off eBay and it works well enough though.
Otherwise, no complaints. It's got every feature except add-on viewfinders, port extension rings, electrical strobe sync and video monitor hookups. Ergonomics are fine, all the controls work. Their VPS-100 vacuum system has warned me about a poor seal twice now - one time, I found a little cat hair (I was staying at a house with lots of cats) on the main o-ring; the other time I don't know what it was, but cleaning and re-greasing the door and port o-rings has achieved a good seal and my camera survived to tell the tale.