A marked upgrade from the regular bobble. While the added heft makes it more challenging to acclimate, unlike the bobble regular this one stays in place once fully inserted; which is something I wish most if not all electrodes could do. Closest to perfection there is, incredibly fun to use, very versatile, and the only point of contention is whether you can insert it or not, as the completely spherical shape means a rather abrupt increase in diameter compared to a more plug-like form factor. Still the best electrode ever.