You'll likely have no troubles with such a short run and large awg. I implement about a 6awg on my subs for the long supply run but use a 12awg jumper between cabinets. (four subs). Go to this site to bone up on the importance of and how to best choose wire size. I can't supply the link but the name is: Speaker Cable Gauge (AWG) Guidelines & Recommendations by Audioholics.
People complain about the quality of the connectors. You can't buy one twist connector for the price of this cable. The cable is heavy duty and the connectors work. They take a bit of fiddling to get them to lock every time but at this price point what do you expect. Overall they do a good job.