Buying an Ikleite's housing vs another company's - at about twice the price - could be compared to buying a piece of clothing form a department store vs from an expensive designer: both fit, the latter looks better and has a closer fit, but there is a definite price advantage. Both get the job done. For someone like me who is only an occasional underwater photographer, the Ikelite has fulfilled expectations, while allowing me to stay within budget.
The housing is bulky and quite heavy - with 2 strobes and a dome port definitely negatively buoyant, but very functional. Basically all camera function are accessible. It takes some wiggling to fit the camera and one has to pay attention that al the levers and buttons are in the right place, but with some practice that does not take much time.
I find the D7000 live view function helpful, as looking through the viewfinder can be cumbersome, but I would not think other housings would offer a great advantage here. The only quarrel I have is that it is hard to impossible to engage the autofocus via the shutter button without triggering the shutter - other housing I have used (for another camera) have done better. I have resorted to using the cameras AE/AF lock button and programming it to engage autofocus which works well.
Ikelite's TTL implementation is a big plus and their strobes, which I like, work seamlessly with their housings.