If you are expecting a strictly kung fu movie, then you may be a little disappointed as some other reviews show. This movie has some good kung fu scenes, and some of Jackie's inventive fighting (The ladder scene is great especially), but overall it's more of a James Bond style action. I like it for what it is. In this style, Police Story 3 is probably a little better, but this is still a good one worth watching.
I would recommend however that you take care about which version you buy. I bought the EIV (Entertainment In Video) version, and it's not the best way to see this movie. It's been cut by about 20 minutes, the picture quality is not too good, it's letterboxed 4:3 (Normally a widescreen movie would be in letterboxed 16:9, meaning more of the available pixels in the DVD format are used). If I made a guess, I would guess it's a quickly done transfer from an old VHS master copy. It doesn't have the original language available (although much of the original movie was in English anyway, and the dubbing here is actually pretty good compared to most of Jackie's movies). It has no extras. However it was watchable, and I enjoyed it, I just wish I'd hunted out a better version. Only buy the EIV version if you can't find anything else and it's a bargain price.