Tri Meters

im looking to buy a Tri meter. Has anyone used either one of these, and what was your experience like?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250412891033

or

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250417075753

I use http://www.gchydro.com/HANNA+GroCheck+Combo+Meter+-+pH+&+TDS+Meter.html

It works well. Only ever had to calibrate once every couple weeks. I store it with a little 7 buffer in the cap. The cables it has are long so I mounted it outside my grow closet as well.

The ones you are looking at, you get what you pay for I think... $50, $120, $200. Hanna sits in the middle.

The Nutradrip Tri-Meter rocks. So far so good, expensive, yes, worth every penny so far