What's it like to be in a sub

My question is pretty basic. Having never actually been down in a sub, I wonder what it is like? I remember the conversation about windows a few months ago, and I agree, that the reason I would risk my life is so I could look out at he fishies. I am impressed with the SportsSub currently, mostly because of the view ( I understand the part about wet subs being under different design limitations than 1 atm sub ), but I'm not sure I'd stay fond of always being half wet. Also, the depth limitation of 30 - 120 ft seems kind of wimpy. The other sub I like is the Lake Diver or K-600. My concern there is that it only has a few windows. Are the small windows enough to get the full, exciting view of the wonderful world underwater? I would primarily be in fresh water lakes. I'm open to advice...