From a practical perspective I find soldering easier, quicker and more reliable long term. This quick connect stuff would only make sense for me if:
- The pickups came with the connector attached. Which is problematic in itself because different vendors have different wiring codes and they'll all have to follow some standard wiring schema, e.g from left to right NthStart/NthEnd/SthStart/SthEnd, something like those lines.
- The connector should be small enough, or the guitar(s) should be routed accordingly so that the connector can easily travel back & forth through the hole between the pickup and the pot/switch cavities.
Can't see this happening anytime soon, so for me it usually goes like this:
- Heat up the soldering iron and pop a stubby white waiting.
- Unsolder the pickup.
- Unscrew the pickup, drop the trem (no hard tail) and pull the pickup out.
- Squeeze the replacement pickup wires through, drop the trem again and install the pickup.
- Solder.
About 10 minutes all up, including the stubby liquid to air swap and testing the DCR resistance to make sure I didn't mess anything up.
I'm not a pro guitar guy (got back into electric guitar last year after 28ish years of hiatus), but I'm mechanically inclined and don't shy away from building my own PC or servicing my own cars (engine / transmission oil change, brake disks / pads / fluid replacement, alternator & water pump swap etc). Sometimes I f^&* things up monumentally - still have a '59 neck sitting around with one dead coil

(( - but otherwise it's good fun, learning new things every day. Jack of all trades, master of none.