No, but I have a couple of friends that went through it. A lot of hell stories, but neither of them walked away feeling it was a wasted education. In fact, it's a damn good career move if you're willing to spend a good number of years as a military officer once you graduate. However, neither of them are gay!
You MUST have a great memory. You MUST be able to be run on all cylinders both mentally and physically on little to no sleep throughout your first year at the academy. For example, having to memorize the front page of a newspaper before breakfast; shit like that drives a lot of noob's (Plebe's, I think they call them) into early retirement.
If you're gay, reconsider. One thing they've both told me that you need to think about: homophobia runs rampant, so military academy life can be brutal, even dangerous, if your peers find out you're queer. Hazing is outlawed but still very common, even allowed "off the record," which means .. well, you know what it means.
I love the Navy. I'm a USN vet., so it's hard for me to trash the idea of attending one of the finest institutions in the U.S., but be true to yourself before committing your time and U.S. taxpayer dollars, to something like this.
ROTC isn't a bad option, and it's safer.