Has anyone here tried any servos from Hobbcity?

I have the HXT900 and the HD-2216HB. The first is 9 gram..the second 15.5 gram. It's digital. rated hold out troque is 2.2kg/cm (30.5 oz/in). ( Multiply kg by 13.86 to get oz ) ( X * 2.2 * 16 / 2.54 ) The HD whines a bit under load. No jitter and no whining except when it's holding. The HXT is powerful for it's size. And Tight.

Anyone with good luck with them?

Anyone with bad luck with them?