Things I liked: High quality replica. Beautiful gun. Super fun. The best testimonial is that I have purchased three (3)! The one I bought myself was taken over by my son. So I bought another for myself and the third for my second son, so he wouldn't take mine. Reasonable accuracy. Good trigger pull for me. Smoothly functioning safety, magazine and mag release.
Things I would have changed: Truly can't ask for more for your money...
What others should know: One of the three MP5 K-PDW's developed a CO2 leak within the warranty and was QUICKLY replaced by PYRAMYD AIR (Thanks Pyramid!). No other problems with any of the guns including the replacement unit.