I have 2 pair which I like..the Terry knickers (not the spin-nickers) and the PI Sugar Knickers. The Terry seems to have just a little bit thicker spandex or maybe it's tighter woven..so I tend to wear them more than the PI's. My friend wears the Terry spin-nickers and she said she likes them however the padding isn't conducive to long miles..she's done 50 mile rides or so in them and didn't have a problem. But they are more for spinning class than riding, per the advertisement but she tried them on and she liked them.