Big hit with 11 year old tortie - very sturdy
I chose this circuit over a Catit one because of the fully 'open top' which I knew my cats would prefer (i.e. get less frustrated with and therefore play more). My tortie thinks the 'bridge' feature is the best thing ever and so far has played with it several times a day (and night..). It's easy to assemble, very sturdy and won't be easily damaged by mischievous paws. The flashy ball, being weighted, rolls backwards/forwards when it slows down, adding an element of unpredictability. A great buy!