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I use the Beyerdynamic M88 in my small home studio to record the flute. It has warmth and detail that I find superior to other dynamic microphones that I have in my locker.
Great microphone. Has a little bit of hype to it, so it shouldn't be considered perfectly flat or perfectly smooth. However, I like it a lot on toms / kick and I think it is solidly designed. I am a fan of md421 as well. This mic competes within the same domain as the 421, which is saying a lot.
On toms, it is slightly smoother than the 421... which is better is purely a matter of taste. I'm glad to have both in my toolbox.