Go read reviews and you'll get your answer.

In terms of strength, Bloom is kind of weak (~3 vrooms, rather buzzy). But, all my Leaf toys wear great -- they keep a charge well and I haven't seen any evidence of battery life failing and definitely no material problems. It's a well-made line, I just wish they had a little more oomph. If you're interested, the strongest of the line is the Life, with the Fresh a decent second.