I personally hate, hate, HATE double runner skates on public sessions. IMO, those things are more dangerous than "real" skates. There's this darling little girl who shows up on publics, and her mom INSISTS that she can't skate in actual skates and constantly has her in those stupid double runners. This poor thing is trying desperately to jump and spin and do crossovers like the big girls... and she's just killing herself with falling.
I told the mom, "You know, she might do better in real skates..."
and the mom looks at me like I'm just the dumbest person on earth and says, "Shecan'tholdherselfupinrealskatesandithurtsmybacktoholdherupsheisFINEthankyou." And she skates off without another word to me.
Later on the little girl came over and held my hand for awhile and we chatted about 4YO things... the mom looked FURIOUS and told her to come over by her... LOL!!