Life saver! I used it on more than 25 mails and since it appears to work locally I hope there's no limit. Also it's so easy to use. And works on multiple mails at once, converting them into separate files, just what I needed! Awesome, no issues thus far.
As recent reviewers are saying - you have to upgrade to actually take advantage of it. Just connect your GMail with Thunderbird and download away all the PDFs you want.
Limited to 25 e-mails per month, even if it's the same e-mail.
You then need to upgrade to a premium service. Just Print All and Print to PDF.