Does anyone have any experience with this brand? The local sporting goods store has them for half price for Black Friday weekend. Sale price is $7.99 for 30 rounds.

No personal experience with them myself. However, if you are not a total magpul fanboy it may be worth picking up four or so for some testing and evaluation at that price. Here is a review done by major pandemic on them, MFT Mission First Tactical MAGS AR15 SCPM556 Review. They do look decent. They also appear to be a blend of Troy and Magpul mag features.