I believe I purchased my first Vacation Rental script in 2013 and just updated to the newest version as soon as it was released. As with any new piece of software/script when it is first released there were some minor bugs but a quick support ticket and they were quick to fix any issues. The product itself is easy to install and very user friendly even though I am not a professional web developer. However, purchasing the developers' license of the script enables my website developers to tailor the product to suit my requirements.
I have no hesitation in highly recommending PHPJabbers for your web development needs.