I've had a pair of e22s for a few years, and my experiences are similar to Steve's.
The e22s are outstanding drum spot mics -- lots of headroom, easy to position, and they sound clear and full regardless of SPL.
They take high SPL really well in general. I've found them useful in places where I wouldn't normally put an SDC -- they're great on bass amps, for example.
To my ears, there's just a bit of a tradeoff for all that headroom with quieter sources. Acoustic guitars still sound great, but you'll need a quiet, high-gain pre. On really delicate sources, they can sound a little thick compared to say, a Schoeps.
Overall, though, I think they're great and worth the money, particularly useful if you record louder groups.