This would be a great starter rack for someone just getting into trad climbing. They are sold in the set of five Robots and/or a set of three Microbots, or the complete set of eight. They are well-built and economical for someone with a tight wallet looking for a whole set or just wanting fill out their existing rack. I've seen the whole set of 8 Robots/Microbots for as little as $200, and each individual cam goes for between $28-30. All cams have machined-in cam stops, and the action is smooth as silk. The coverage range isn't as good as other cams, and the larger sizes, specifically the #4 and #5, tend to walk a little. But beginners will love this set for the price, and they can fill them in with Camalots and TCU's later on down the road.