I have been using a Tascam DR100 MKII for about 7 years, produced a few albums with it. Primary use is field music recording, but I use it in the studio too sometimes. I use a preamp with digital input to the DR100 when possible, otherwise send the mics directly in. And on a couple of occasions I've used the internal mics, which are not terrible. When the MKII started showing reliability issues, I got a MKIII. The display is bigger and clearer, the preamp is better, and otherwise it seems the same, with one exception: the case is a bit lighter and may be a bit less durable. But overall, a solid product.
New York, NY