We've used LVIS before and stuck it on a few LON sites that we took over. It worked. To be honest (call it biased if you will), seeing comments from Loytec's own personnel regarding their views on BACnet completely turned our company off from wanting to use their products (and I'll bet we're not the only ones). I attended AHR in Orlando this year and I even heard a company say that they keep track of this site and elected not to do an OEM agreement with Loytec because of those comments.
In all seriousness though, I hope Loytec puts their best foot forward and gets it resolved. There are only a few companies out there offering BACnet solutions that do not require a "country club membership" in a controls line to buy. I realize opinions carry alot of weight and get your point NINAX.
If I were "integrator", I would be demanding someone from Loytec to come to the site.