The 5 cm diameter is no joke, and the transparent blue jelly feels slicker than I expected once warmed up. Took me a minute to find a comfortable angle, but the realism of the shape makes it worth the patience.
I was honestly a bit intimidated by the 5 cm diameter at first, but the jelly material has just enough give that it's manageable with plenty of lube. The transparent blue makes it easy to see exactly what you're doing, which I didn't expect to appreciate so much.
The blue transparent jelly looks great and the 5 cm diameter is no joke — definitely need to warm up first. Once you're there it feels amazing, just wish the base were a bit wider for grip when it gets slippery.