Has anyone used this egg candler?

[Cowgirl71]

http://cgi.ebay.com/Incu-Bright-Cool-Light-Egg-Candler-Bright-and-Compact-/230463304786?pt=LH_DefaultDomain_0&hash=item35a8aef452

It's sold by Incubator Warehouse (eBay has cheaper shipping). They say it works better than the GQF candler. I like that it's battery operated so I can use it down at the coop with broody hens. Have any of you tried this candler? How did you like it?

 

[JustAChickenLittle&More]

These are good. The ones that look like a black pen, are not. I did have one that looked like a red pen and it was good as well.