6 in 1 pH PPM Temp meter (Should I get this?)

http://cgi.ebay.com/PH-PPM-TEMP-TDS-EC-CF-METER-WATER-HYDROPONIC-TESTER_W0QQitemZ320441915252QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4a9bd39774

It seems like a good deal, what do you guys think?

i got mine for 200, its sicko, without it i probably would of fuckd up measuring cause when it comes to following the instructions on the back of the chemicals i say fuck it due too it sometimes isnt right, dont cut pennies on the supplies or you'll later on cut dollars for saving the start up money.

i always question things that do a bunch of stuff in one lol i'd say you definitely need to monitor all of those things, but with one device? maybe, maybe not, i wouldn't