I am a huge fan of boot camp. I entered med school with a liberal arts degree and very little background in the hard sciences.
I got a lot of positives out of it and strongly recommend if to anyone.
As others have said, it's certainly not necessary, but definitely helpful.
With my background, every course is new information, biochem and histology easily take up the bulk of my study time. Boot camp gave me a really good understanding of anatomy. I was amazed how much I was able to learn and retain from just three weeks. It definitely allowed me to have more time to spend on my other classes which has been invaluable.
Another advantage, for me, was learning new methods to study such a massive amount of material in a short time. On day 1 of boot camp I realized the study habits that got me through undergrad were not going to cut it here. Having those three weeks to experiment with my studying methods without the pressure of being graded was huge.
Also, not necessarily important, but nice is meeting people that will be your classmates. When school started I felt more relaxed already knowing many of my classmates and several 2nd years who were ready and willing to offer their assistance. Not that you'll have any trouble meeting people here, but I've found that it is still people I went to boot camp with that I spend the most time with.
I can only speak for myself, but I don't think I feel burnt out because of boot camp. If anything it made my first semester much easier than it would have been otherwise.