I have upgraded my Ikelite Housing to match my Nikon D800. I think they are a great unit.
I have never had a problem with it. The only adjustment I made was to get rid of the shutter release spring which did little other than get stuck occasionally.
It was used in creating this Award Winning Underwater Panorama (2nd and 20th prize images).
I have used it with both my Nikon D300 and D300s. It does not match every button on the D300s but did not hinder my style of shooting.
Note: There is no Port. Port is purchased separately
It has 7 days remaining here.
Let me know if you have any questions.