I picked this one up for a bargain together with some lenses.
Haven't done much shooting with it, I'll update this when I have.
Pros:
Seems like a very sturdy and rugged camera. I'm pretty confident this thing would survive a war
A lot of features, especially for a camera this old. Things like DOF preview, self-timer, X-sync socket, manual as well as automatic lighting, ... (see chart above)
Winder available, yet hard to find. Once you attach it it'll give you 2 fps.
These aren't as easily found as some other models, so if you see one definitly check it out. Also, this one came with a 50mm 1.4 as standard lens, which only shows that this camera was aimed at the more advanced photographers. So if you see one 2nd hand, be sure to check out the lens.
cons:
The ASA dial is extremely awkward to use. It's positioned around the lens mount, which is a very illogial place, especially if you compare it to the ease of the mechanism on the K1000 (at the shutter dial).
Takes a while to get used to, and always seems to block when you're in a hurry
Compared to models as the K1000, it's pretty heavy. I can imagine that combined with the grip, this thing might get a little too heavy for some people.
Doesn't have a TTL flash mechanism, but I'm not an expert in flash photography with film, which is why i avoid it, so this doesn't bother me.
Conclusion:
Nice, sturdy camera, which is built to last. Apart from some weird design choices that were corrected in later models, this is a camera that'll be a pleasure to use even after so many years.
These were just my initial impressions, but I'll update this once I have some more experience with this camera after this summer.