I would just like to add my two peneth.
Yes the support is not good but what do you expect from box shifters.
We use there NVT and for the price you can not beat it there 4 way tx and rx are great passive and powerd and there single balluns fit into the Vantage domes really nicely also managed to get past the problem on the DM range where its looking for a bang on 0 volts peak to peak we had an original 32 way rx hubb on 2 DS2s and we had to change it we used LJD and it was fantastic we have now heard NVT have now done a mod for the DM range and are going to do a swap for free.
We have just fitted an Apolo and a Zeus there new range and the playback is awsome and the operation for the end user is miles easier than the old units all mouse driven yes you get a mouse with it and lots of nice features, you get what you pay for and I couldnt knock either of these units or there transmisson.
Never judge a book by its cover.
Anyway thats just me but have a nice christmas and a fantasic new year.