I haven't been able to use LTP 6 yet because it's not working properly on the iPad. I love LTP 5 and highly recommend LogTen Pro in general, but my advice at this stage would be to wait until the bugs are ironed out before purchasing or upgrading to version 6. Unfortunately, because of the way the App store works, it is not possible to purchase an older version once the new version has been released. Coradine have good support and I'm confident they'll get this sorted, but the app doesn't seem to be ready yet.