I'd have to say the quality in the KSport coilovers seem to be very good, well just from looking at it (since I haven't tested it's reliability yet) texture & quality of the material are very consistent. The ride is nice & firm, not bouncy at all and not too harsh.

I can only compare my Ebay sleeve-overs on stock struts with these, which felt like stock & was smooth over bumps. Now, when I feel most bumps in the road I just get a quick dip and it comes right back up quickly. Overall I like them a lot, & obviously it handles well.