Great if you need it, overkill if you don't
I purchased the APC Smart-UPS 1500 because I needed a pure sine wave power output. My computer power supply is Active PFC and requires that for the UPS to work properly. Using an approximated-step or simulated sine wave would not work for my computer. If you have an Active PFC power supply (recent Dell OptiPlex and Precision workstations use these), you'll want a pure sine wave UPS such as the Smart UPS. (although you may want to test a cheaper, approximated or simulated sine wave UPS). The fan is a little louder than I prefer (and I actually unplug it at night since this is in my bedroom).
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