I have the 4 loop version and this 2 loop version. They are both excellent. Instant, silent switching, no active circuitry to colour your tone, simple to use.
I use them with a TC G-System to give me extra pedal loops, and the G Sys programming makes this even simpler to use. IMHO these are a better option that using hard wired relays such as the ones in the G Sys; the G Sys relays are not instant switching and I find the lag annoying. None of that with the G Lab products.
Very well made units, and they are also the cheapest alternatives I've found to solve my problem. Better than everything I've seen out of the US market.
I have a G Lab MIDI line switcher also, and it too is really well made and gives instant switching.