We use MS TFS for testing, requirements, projects and ALM; , and probably we switched from MS TFS to SpiraTeam.
In this moment, we are evaluated the free vesion of Rapise testing an Spira Test Installation
The the support team is very helpful. Answers are coming fast and they are helpful.
At the moment, I hadn't much time to test and use both products, but the usage of the tool is very intuitive in dot net and windows and IIS Servers
I hope work with the different browsers on different platforms without any client installations (Windows, Linux, Unix , Safari, IE, Firefox, Chrome). A little bit more flexibility in the customization of the requirements module are appreciated.