I’ve owned Better Rename for a couple of years now, and it is totally worth the price! The dev is a great guy and responsive to emails, and the licensing is very fair…I’ve not had to pay for any “upgrades”…you buy it, you got it. Period.
As far as functionality goes…don’t believe the other reviews stating that it’s “limited” and so forth...it has a bazillion built-in options, but if you’ve got some esoteric thing and it’s not already there then you can build it using Regular Expressions. There are no limits, that I’ve run into, on how many changes you can make to the file names. You can change files to some name you want, remove text, add text, re-sequence, just keep piling on the “steps” until you’ve got what you want. I’ve renamed hundreds of thousands of files and it has never let me down. The “change to" panel shows you what you’re going to get, in real-time, so you see the changes as you apply the various options which allows you get exactly what you need, and the confidence that it’s going to do what you want so you don’t end up with a bunch of mis-named files.
Check the other programs out, buy the bundle with the Folder Machine and you can mass manipulate files and folders to your hearts content.
As far as I’m concerned, one of the best utilities I’ve purchased.
-Rob