I encourage our kids to use the 7 pad full girdles. Even have knee pads in them. No one forgets their pads that way!
We just went to that this past season. Kids liked them but we had problems with our Nike game pants sliding up over the knee pad. Refs removed several kids from games until they taped the pants down to keep them from sliding up
Most of our kids end up buying their own 7 pad one piece unit, so we have started to purchase them for the entire program. It has saved a ton of time, energy, and sleepless nights of who was going to forget what on gameday.