Since my computer has a 875W power supply, I switched from the ES 700 to 1500 (ES 700 sometimes went into overload). The UPS is delivered loaded and worked immediately. Warning: there is no power cable included, but only two power cord. I have used my computer, no problem. UPS worked at Stromausschalttest perfectly. Bridging time with my computer with monitor for open Firefox and Thunderbird 50 minutes. For PowerChute: initially had teething problems due to lack of documentation. Of the three supplied programs you may only install the agent, if one UPS operates only on the monitored computer. If you install the server version does not work, the connection to the UPS. The APC hotline was very hard to support me and it took place also announced recalls. Here the chaff from the wheat. High praise, very good customer orientation. Shortcoming: the instructions are too meager (partially on CD) and partly misleading. The software works very well now. It's also nice that the display on the UPS. I can include the applied voltage or current consumption read here.
