I have one of the new Diamondback FFP 4-16x44mm and so far so good. Using it on a buddy's Savage Axis .308 for this deer season. It will go on my Savage Model 11VT .223 after the season.
The reason I didn't go for the 6-24x50mm was due to pretty good reviews showing some glass quality issues past 20x. so I figure that wasn't worth the cost difference as the glass on the 44mm version is clear all the way up to 16X. I plan on getting a rifle to shoot long range and will buy a PST Gen II FFP if I go up in glass size and magnification. Of course that cost over twice what the Diamondback costs.

Yep celltech's correct it is actually a 6-24x!