The best part about appavance is that you can manage all your tools like QTP/QC Pro etc in one place which saves time for me as I dont have to switch between different softwares again nagain. There are very less tutorials available online if you just started using this tool so it always takes sometime before we start understanding how things work but once u get used with its API's & commands then nothing could be better than this! UI has changed many times over two years of our usage hence my views might not be up-to-date now. Its worth giving try though. Automation tests development speed enhancement, improved accuracy level (which was down sometimes due to human errors) easy deployment across multiple locations.