Right now we are using the bumblebee and having alot of fun. Our cats Julie and "Sillybean"(Selena) work together as a tag team to get the bee.
They will rub up against us and then go sit by the bee waiting to play. We have not noticed any down sides at all when playing with the bee.
The other items we bought have yet to be tested. Very happy with our purchase

Both cats love it, it is so light and durable. It moves like a fish with quick flicks of wrist. And it’s the same colour as my Tuxedo cat. 😄