-No tools to adjust
-not as streamlined as some regs(preference)
The best thing about this reg is that you can only raise the psi so much before the pro stops kick in(you have to set them to your specifications). there are some older models that have huge gauges but that's too bad. its cheap to buy a new gauge if that's the case. is pretty stubby in terms of length. another great feature of the reg is that it has input and output(macro in/gauge out)on both sides of the reg depending on weather your predominantly a righty or lefty or your marker setup. you can also sort of use it as an emergency on/off by turning the very bottom out. there are around 6 colors to choose from. the only problem i have with it is that it is slightly wider than most regs but i does make up for it in its short length in most peoples books.
Great in terms of consistency and size. very accurate gauge. quick psi raising or lowering. great air flow. the only problem i have with it is cosmetically other wise id give it a 10 for performance.