I've been using these microphones for a little over a year, and I fell in love from the start.
Very easy to get just the sound I want.
The major downside is that the microphones are a tad large for toms, but once you've fiddle around with them, you can get them out of the way.
Another downside is that I've had a hard time to fit them on a few DW drum rims properly, but on all other drum kits they fit well and are easy to place just where I want them.
Even with these downsides I wouldn't hesitate to buy more if the need would arise.