Jigs are great. Made a couple of homemade models thst didn't work as good as I would've liked so acquired some commercial models.
I have both an older Bitzenberger and a plastic Bohning and honestly I prefer the cheap plastic Bohning jig.
Alot of guys complain that glue sticks to the plastic...well, easy solution: oil it. I use just a smidge of olive oil on the tip of my finger and wipe it along the contact surfaces inside and outside. Works great to prevent any glue slop from sticking.