Well let's see:
#1 the run time kicks the average UPS's ass.
#2 in places with constant under / over voltage problems the unit can be set to provide constant locked output voltage.
#3 six battery protected outlets, with the choice of shutting down three outlets via software during extended outages.
#4 90% of battery capacity recharged in 4hrs home UPS's take 12-24 hrs to recharge.
#5 My buildings power grid is 50+ years old and we get blackouts once a month for at least 15 to 30 minand the ten to 15min run time of my consumer UPS's suck.
Also I get the same prices on batterys that my work does that's why I get these used UPS's. Now if I got my eye on this little bastard:
http://toronto.en.craigslist.ca/tor/sys/1362550388.html