First off, I never thought the Olympus housing felt like a toy at all despite the combination shutter release/zoom lever, which didn't exactly feel robust out of the water. That being said, once I was in the water with it, the lever worked fine every time. If Oly had charged $200 more and made all their housings black rather than all kinds of funky colors, I bet no one would be complaining about them
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As to the user-friendliness of the Oly housing, I find it much easier to hand hold than the Ikelite housing due to the hand grip on the right hand side of the housing. If you have dual strobes with handles attached, I guess this one might be moot. Also, having just complained about the shutter/zoom lever, I like the fact that the one on the Oly housing is self-centering. On the Ike housing you have to start zooming and stop zooming rather than just pushing the lever and letting it spring back to the center position. The oly housing is also a bit smaller and the internal flash on the camera works a bit better with the Oly housing because the port is a bit smaller -- the Ike manual says to use full zoom with the internal flash or you might get shadows. Never had that problem with the oly housing and its built in diffuser.
Well, that's my list!
Mike
[Edited on 2-26-2002 by MikeO]
[Edited on 2-26-2002 by MikeO]