Here is another vid review of the M&P Apex Tactical barrel, his is the gunsmith fit barrel, which is the only one I would get if I decided to get one. IMHO, a properly fitted Apex barrel is probably the most accurate barrel you can put in your M&P pistol at any price. My two stock M&P 2.0 compacts shoot equal to my two stock Gen 5 G19's which is plenty accurate for me, but if I desired even better accuracy, I would get the Apex gunsmith fit barrel. The Apex barrels chambers are also within the sammi spec dimensions so you should not sacrifice any reliability.
https://www.youtube.com/watch?v=OWc5Ghx_1gI
https://www.youtube.com/watch?v=sKz9QarKa80