Has anybody used the nutradip ph tester? here is the link, is it any good?

Has anybody used the nutradip ph tester? here is the link, is it any good?
http://www.betterthannature.com/catalog/product_info.php/products_id/853

anybody???

I haven't used that brand myself - but it's expensive enough, so it must be good!

how much are ph pens ussually?

any comments?

I Had one and it sucked. Always lost is calibration, and after about 2 months it would not calibrat anymore. Now i use the Hanna Gro'Check and its the best ive had so far.Its fully digital and auto calibrating.that meansyou just dip it in calibrating solution and the meter does the rest.