For light duty use I think it's a phenomenal light. Someone like my wife is never going to have any issues with hers because she'll never twist it enough times to make that metal tab sag. She uses it maybe once a week and loves it.
For medium/heavy use I still think it's a good light. But there's some maintenance needed to keeping it functioning properly, and most people probably don't want to have to maintain a $10 flashlight. Also, the Ti can be modified to only keep one mode.
There's also the T10 which is a twisty (with memory) and doesn't have have the quirky two-stage switch like the Ti. So you can get their efficient circuitry and moonlight mode without the hassle of the Ti switch.