No issues with the seller. The first kit arrives without packaging and the switch was DOA, it did not work. I thought it may have been an open package and returned it. The replacement arrived quickly (without packaging) and the switch clicked, so I put the kit to work and it worked, well everything but the switch worked.
The switch in this kit is as cheap as it is possible to make. It lasted for the first test, you can feel it as it die in your hand, I removed it but it never worked again.
I like the kit, it works good, saves time and make it lot easier to check car systems.
So I bit the dust got a real switch out of my part bin, opened up the junk switch cut the wires off, tossed it and used the housing to make a real switch that works and haven't looked back.
I've used the kit several times with my switch and no issues the kit has everything I need and works.
It not for the switch, I'd give this kit a solid 5 instead of a 4.5..
Save your self the time, when you get this kit replace the switch ASAP, you won't regret it and will like the results.