Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Economical alternative to APC's RBC7

After spending considerable time researching replacement batteries for my APC SmartUps SUA1500, I decided to give this one a try. I'm glad I did. Its fit and finish are every bit as good as the original battery pack, it installs easily, and it performs just as well. I used APC batteries while my UPS was under the extended factory warranty, but now that the warranty has expired, there's no reason to continue paying the higher cost of the APC battery, which is almost twice the cost of this one. I'm completely satisfied with this battery pack...and the shipping was very fast into the bargain.