I'm with Kevin. And the way around this is to try out the third party software on your own. Don't look to them for support. Test it and see if it will hold up connecting to a Listener and during a failover. You may wait a long time for the vendor to say its OK.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning