I actually got an MD-12 with it. (and 55mm Micro Nikkor, cable release, and SB-10 speedlight) I might try the grip out sometime, but one thing I like about the old SLR's is the small size.. that grip kinda ruins that.. heh, heh.
It's tough to get used to this camera after using the K1000 for so long. Meter's on the other side of the viewfinder, so that's a little weird. The shutter speed dial is opposite of the K1000 too so that keeps trippin' me up (fe rotates counterclockwise for slower speeds, pentax clockwise), but so far the camera's nice. It had just been completely serviced by Nikon before I bought it, so it feels practically new. I have about 10-12 shots left on the roll, so we'll see how it works soon. (hopefully i'll have some keepers)