I have used LogTen Pro since version 3, it is now on version 5. I have the Mac app and the apps for both the iPhone and iPad. I have manually transferred my 12500+ hours from my paper logbooks to LTP over the past 12 months or so and now I wouldn't be without it. I can now create custom reports of my entire flying career as well as having the ability to print a perfectly legible logbook at any time.
The apps are not cheap to buy all three but unless you are a geek like me you really only need the Mac app and either the iPhone or iPad app. I bought mine through the previously available upgrade path so luckily I didn't have to pay full price for all of them.
Like all software LTP has had some issues, mostly minor, over the last few years but the design and development team at Coradine are very responsive to questions and concerns. They are pretty quick to fix problems when and if they occur via software updates.