Like with anything else, the range of quality in the concentrate world is really high.
If you can get shatter from a maker like TerpX or First Class or the like then it really is amazing. Great flavor, super clean and (of course) stupidly potent. But a huge percentage of the concentrates on the market are total crap (poorly or not at all purged, nasty with carbolic acids, poorly handled or processed, etc).
Definitely need to buy the rig if you get into shatter or other high-grade concentrates.
I'm running with a Mobius Penta Disc Perc rig. Amazing dispersion without a ton of drag.