I've been out of R/C for a couple of decades (wow, that makes me seem old). BITD we only used Tamiya connectors. Sometimes they got hot and melted a bit. Now-a-days it seems that Deans Ultra plugs are the most popular. I've spent the past three days converting my small fleet of cars, up to 4 now with the addition of a Fury yesterday. This is what I think of Deans plugs: YUCK! They're tiny which makes them difficult to unplug without yanking on the wires. Speaking of wires, why are are attached only using solder? There's no mechanical connection like the crimping on a Tamiya plug. Sure, use solder but also have a mechanical connection on such a high use item. Since they are small, they're a pain to solder up. I had to Jerry-rig up a rubber tipped clamp to hold the connector while I soldered the wires onto the tiny little tabs. It's just ridiculous. The requirement of heat-shrink tubing to act as an insulator is also not wise. Heat shrink is great and all but it's not as good at insulating as say, oh I don't know, maybe wire insulation! I like what HobbyCo has done with the design of the plug that they call a Star plug. I think I might re-convert over to these but they only address some of my issues. Does anyone have any experience with the Castle Connectors? They look promising but I haven't heard much about them.