He also recommended that I buy the Ikelite case.
What do you think?
After I purchased my G10 I was looking at which housing best fit my needs. Like I said before I started off with an Olympus system. A buddy of mine was using a Canon housing at the time. When comparing the build quality of the Olympus to that of the Canon's housing I noticed a huge difference. The Canon's case was somewhat flimsy, the buttons are plastic and the overall quality seemed quite low. The Olympus on the other hand, had a sturdy case, and metal buttons/components throughout.
I do quite a bit of shore diving which requires navigating down/up steep goat trails and entering/exiting over slippery rocks. I wanted a system which would hold up to these aggressive conditions, so naturally I chose the Ikelite.
Now with that said, many people have used the Canon OEM housings and have had no issues. For most divers the Canon housing will suffice, but for my specific needs I wanted something a bit more robust. If you do mostly boat diving, the extra cost of the Ikelite might not necessarily be worth it.
Both the Ikelite and Canon housings are not without their own limitations and issues. They both don't have access to the rear dial, which means when shooting in full manual you must use a combination of button inputs to fully control the shutter and aperture. There has been a few accounts of latch defects in the Ikelite "which has been addressed and fixed in the newer housings" and since the zoom control has no return spring, you must return it to a neutral position after adjustment or the camera will fail to respond. The Canon housing has had cases of button sticking and defective molds which create issues with the sealing surfaces, ultimately leading to a flood. The only housing options which allow for control of the rear dial are the RecSea, Fix, Patima and 10bar. They are very robust machined metal housings and extremely compact but they cost around a thousand bucks
If you do a lot of shore diving or are known to bang your gear around I would recommend the Ikelite. If you are a boat diver and take meticulous care of your gear I would recommend the Canon. Both housings are expandable, you can add strobes, trays, wide angle and macro wet lens but without the extreme cost of the metal housings.