I didn't have any problems with keysoftservice.
I first bought a hdsx3 , ander after a while I regretted that I didn't buy the hdsx6.
Keysoftservice offered me an upgrade...I had to sent back the hdsx3 and they sent me a hdsx6.
I had to pay the difference.
I also bought the hdtechmanager6000 and everything works very good.
They are working on an upgrade for the hdsx6 .

I think once the kn7000 is arrived we will not need a hdsx3 or hdsx6 anymore.
We will operate through the usb port and with smard media cards.

I will surely buy the kn7000 and try to sell my kn6500 with hdsx6 and hdtechmanager.
I hope I'll have a good price.

Greetings,
Alain