Are Apple boot camp drivers excellent on Windows 7?
In my experience, if found that Windows runs great on my MBP 15''.
Drivers installation is very easy using Bootcamp.

Actually, a study has shown that MBP was the best performing laptop for running Windows operating system.

I would recommend to use a mouse on Windows. I am not very comfortable with the touchpad but it's more a personal thing, so you should give it a try and decide for yourself.

If you choose to buy a MBP retina and you connect to Internet using the Ethernet Thunderbolt adapter, be sure to connect it at boot time like described in this other post.