They look nice, en masse but:
- poses in plastic are typically more limited than in lead (especially the nicely wide ranges from PP)
- weapons in particular can be fragile, and not easy to fix when broken
- the clean-up effort (even for hard plastic) can be at least as onerous as for lead castings
- there isn't the same heft as metal
- at the end of the day, they're just plastic
I bought some very nice-looking plastics a while back but, having cleaned them up, have now lost the appetite to actually paint them. I probably will one day, but will make rather more use of a spray can and less of a brush than normal..