One of the things that we have learned the hard way with quest is that their software doesn't work in a 64-bit server environment.
If you have a 32-bit machine in your network, you can run their software on it, if that works for you.
For our clients that are on a pure 64-bit platform, we are working on an interface with Quest so that we can onboard the files for the practice without using their software.
Having dealt with other labs, I can assure you that there is worse software out there.
My personal perspective is that Labs will be getting out of the software business as they need to focus on their core business and there are other players that are focused on meeting provider and practice needs.
