Miditech MIDI thru 7 V2

I ordered the Thru 7, but I had problems integrating it into my setup. Stuck notes, ghost notes, random glitches...it was clearly not working. I sent it back and received a substitute, which worked a bit better but still had enough problems that it was not usable in my studio. It's a pity because it looks like a very nice unit, and there are no alternatives at this price and for this number of MIDI ports. Maybe something is wrong with my setup, but I regularly use the MIDI Thru 4 from the same company, and it works perfectly. Pity!