I just recieved my WP-CP4 yesturday but will not rx. the Coolpix 7900 until Tuesday but..
I currently have the Coolpix 5200/WP-CP2. I already owned two 5200 for land cameras when I noticed the cases were available. I am pretty happy with their land quality. For $200 for the WP-CP2 I had an underwater camera (so I thought.
I was/am a beginner and just wanted to be able to point and shoot. I don't care about setting a bunch of setting for each picture, adjusting strobe settings, photoshop, irratatng my dive buddy, etc. I just wanted to be able to take some pictures for the memories.
After purchasing the case, well I'm sure yall know how it goes, I purchased an INON D2000. (My $200 went way up) I read everywhere I could to find for reviews on people who had actually used the 5200 w/ or w/out a strobe, but I found nothing. I took the chance because remember, I just wanted point and shoot.
My first dive with this setup was in Dominica in Feb. Took a bunch of pictures. Wow! I am amazed, I felt like a pro. By my second dive on the first day, I had setup the camera and strobe for point-and-shoot for the rest of the 15 dives. No fidling with knobs, buttons, etc. I have some bad shots but I also got a bunch of good ones. I have found that good bouyancy and skills is much more important for taking good pictures than the camera.
Admittedly, after seeing some of my bad pictures, I would of liked to be able to clean some of them up in photoshop. I did lose some good ones. But then again I probrably wouldn't have invested the time. I am very happy with the WP-CP2/5200/INON setup. I can both enjoy the dives and take pictures and get results I'm extremely happy with.
I just upgrade to the 7900 for the larger LCD and the Underwater mode. Swimming "through" and reviewing the 1.5 inch display was undesirable. Other than that and the 7.1mp, the camera and housing are identical to the 5200. The WP-CP4 case is also a perfect fit/swap for my exising INON bases and lenses... and STTL with preflash, does work. Hope this helps.