Fowler cylinder bore guage?

[ame="http://www.amazon.com/Fowler-72-646-300-Cylinder-Dial-Gauge/dp/B000J4K016/ref=sr_1_2?ie=UTF8&qid=1358713524&sr=8-2&keywords=fowler+cylinder+bore+gauge"]Fowler 72-646-300 6" Cylinder Dial Bore Gauge : Amazon.com : Automotive[/ame]

Anyone use this? I'll be needing something to check out my used 5.9 Magnum. The other idea is just get a cheaper set of telescoping bore guages and use with my caliper but won't be so accurate I think.