I have announced review of the ATI Talon stock and ATI Talon Aluminum forend some time ago. Now, after tests, I can tell you that it is nice set with many interesting features. The only disadvantages are complicated installation and heavy weight of the stock.
Don’t trust many negative reviews of the ATI stock and forend. I think that most of the negative reviews were from people who installed upgrades incorrectly. I am not affiliated with ATI and this is honest review with advantages and disadvantages of this set.