Welcome to AB, do you know what you've let yourself in for :)
Chrome has had some very positive reviews and as you correctly say it's been commented by many that it is marginally faster than even firefox (which is of course faster than IE) but you have picked up on the major drawback, it is not customisable at all.
At the end of the day you can have as many browsers installed as you want and they won't clash with each other, just pick and choose which one you want to use, so why not download it and see. though it's worth remembering that it is still a beta version and therefore is not guaranteed to be stable or bug free
It may also be worth reading the terms and conditions of use properly as well, as they seem a little restrictive in places, i.e. they reserve the right to limit content available! this may be good for kids, but as an adult (allegedly) I'd rather choose what sites I view, not somebody else!