APC is good rather best both in terms of quality and service. i have used lot many of them in my last job. i have used one numeric ups also then daily for some 8-10 hours without any problem for some 5-6 years. at home, i have used Wipro eMerge 500va for quite long (approx. 10 years), got battery replaced once and repaired (minor one) once (free
). when battery died again, bought a cheap Supercomp 500va ups which i am using for some 2 1/2 years and it is working ok but whenever i upgrade, i will get APC 800va.