Hopefully we are talking about the same software:http://soraco.co/
We have been using QLM for 2 years now to protect a .NET application and are very happy with it. It's been stable and reliable. We use the online activation feature with their Plimus integration. This is what we like about it: it's a complete hands free solution from the moment a customer purchases our software. We just sit back and watch the sales happen. On the negative side, their samples need a little bit polishing although this may have changed now.