Super easy to hook up. A little tricksy with the push-button thing and getting the wire in there correctly but it works out. Biggest problem with it being "difficult" is wires that are perhaps a tad too short. But overall - not very difficult. I took it super slow and got everything right the first time. I'm psyched now because I can swap in different pickups pretty easily. I got the Universal because I initially had a humbucker on it, but ended up going back to a normal SS config. Super flexible. Love it.
Only weird thing with Youtube videos is that I only found examples from Landon Bailey (which ARE great) but he always uses the Vintage 3-Way and I had the Custom. Just a bit different but nothing to worry about.