[Boost-users] stlport?

i'm porting my app so that it now uses stl and boost. can someone please give advise on what stl i should be using? i hear about stlport all the time, but not sure why it is used? ie is it better that the version that comes with the compilers? im using ms vc++ 6 at the moment and plan to upgrade to 7.1. should i use the default stl, or install stlport?