I use the Hama Piccolino an on around 15 different car sockets of different manufacturers. Fits super, does not wobble and takes up no space because it really disappears almost completely in the can. A small little something he is thankfully over, otherwise you'd no longer even get him out.
I run at Piccolino 3 different Navis (Medion, Garmin, Falk), invite my mobiles and insert occasionally my Yakumo PDA. Everything works fine.