The corridor can be lovely. It's usually a lot less noisy than the local dives around Cabo San Lucas.
When I refer to noise, I don't mean the crackle and pop of the reef and marine life. I am referring to the constant drone of boat motors as they travel above you in numbers - back and forth, to and fro. It's one of the things you have to be aware of when diving CSL as you surface. There could always be a boat on top of you!
The corridor has different marine life. There's just less traffic. Just like anywhere else, there will be dive sites that are nice and calm, but it can change and you might find yourself in some current or surging water. But don't worry. It's not like you have to swim back to the boat. I keep my own SMB on me even though most operations don't really require you to have one.
Just last month I was diving there and for some reason the dive master decided to guide us into the strong current for 20 minutes rather than just letting us drift with it. Hmm. That's another story that I ranted about in the appropriate forum on here already. ;-)
But again, the dive sites along the corridor are lovely!
I've dove with Manta divers in CSL.
And another operation I'm hesitant to suggest. (10 years of loyalty but a very bad last experience in Nov).
Nautilus is one company I intend on trying. I've heard some great things about them!
Nautilus Dive Cabo San Lucas