Tigerpaw is a great product. A CRM and PSA all in one. Right now we are running the latest release V12.1.08 and it runs great. Admittedly there were some bugs in V11, but those have been ironed out. We are happy with the product now and where it is heading. Tigerpaw provide good support and their university and resource materials are improving all the time.
This is not an "install and use in 1 day" application. It requires planning around the installation and like all PSA tools requires assistance from the vendor or a partner for the best results. Tigerpaw do provide all the resources to undertake a self-implementation, but if you dont dedicate resources to this task the implementation will go awry. This is no different to any other solution of this kind.