Hello All Has anyone had any experience with Coilover from Dropzone Suspension?
Garbage. All so-called "coilovers" of this type are junk. Putting a crappy threaded sleeve with a little weak spring on a stock strut does NOT constitute a "coilover." Either get good struts (KYB, Tokico, etc.) and good springs (Progress, H&R, Tein, etc.) or if you MUST have adjustability look into the Tein basic coilovers. They run about $750 but they are worth it.
Dropzone does make a full coilover set up, and even tho I know of no one w/ this to get an opinion from, I'm almost certain its better than the cheaper version which goes over you existing strut/shock.
I bought a Tokico suspension kit for $400 which included springs and shocks from Honda Solutions website. It lowered my 99 Si 1.75" and it rides great.