Must have tool, esp for Custom Mechanical Keyboard builders.
For PCB 12-in-1 Multitool
Fantastic tool...I love this thing. For my use in building custom mechanical keyboards the LED tester (both thu-hole and smd) is a god send and had already saved me many hours of having to fix SMD LED's on boards due to being cheap Chinese LED's without a Diode mark or having it backwards. The resistor tester and the variable resistor help save time as well and using the multi-meter passthrough let's me have my multi-meter handy without me having to worry about where I'm going to route the cables on my already cramped work table.
The only con I see is the size so I know I'll lose it at some point but that's my issue to deal with. Plus is I'll be buying a couple more at some point since this tool is now part of my regular tool kit.