Lehle Dual SGoS

First let me say that this product is built like a tank. It feels like it could put up with years of abuse on the road. However, in my particular case unfortunately it didn't solve the noise issues.
For those interested here's my setup and what I did:
Amp A is with a CFH wah, Big Muff, Greer Lightspeed, Wampler Tumnus and Catalinbread DLS in front of it on clean channel. Amp B is without any effects in front, running on dirty channel.
I plugged my guitar into A/B/T input on Lehle Dual SGoS and output A went into wah, fuzz, etc. and into amp A and output B was plugged directly into amp B. When only amp A was plugged in, everything was quiet. When only amp B was connected, everything was quiet. When both amps were connected to Dual SGoS you could hear a noticeable increase in noise. It sounded like cross between buzzing and humming. I pressed the ground and phase buttons in different configurations. The ground button when pushed out made the noise and hum so loud it was unusable, when it was pushed in, it was much better but still far from quiet. Essentially it was the same as when I plug into a stereo delay and split the signal that way. I also tried it with a big pedal board in front of amp B which only amplified the humming and buzzing issues. Once again if only one amp is connected things are relatively quiet but when a second amp is plugged in, the noise floor increases noticeably.
So in summary, even though it is a very convenient amp switching solution, unfortunately it is not a panacea for humming, hissing or buzzing issues that I was hoping for (at least not in my case). Maybe the problem was a power supply (although I tried three different ones), maybe the problem is with the electrical installation in my apartment (although it was replaced a few years ago). I'm not sure. Whatever the issue may be, my rig was not quiet as other people have stated in their reviews so even though I liked the convenience of easy switching, at this price point I had to send it back.
By the way, big thank you to Thomann.de for making this process so painless! Shopping for musical gear online is not easy but Thomann helps out musicians so that they don't get stuck with gear that may not be right for their needs. America has Sweetwater, in Europe we have Thomann! Thank you, you guys are the best! :)

I use this for switching a three amp rig, 2 x MESA Boogie Roadkings 1 & 2 in stereo and using the 3rd button I can drop in an ENGL E670SE EL34, just for fun! The Lehle Dual SGoS performs flawlessly, no noise or hiss, no tone colouration, no ground loop hum or buzz, no pops when switching. If you need to switch between amps or other gear then this is without doubt the best piece of kit on the market. Not cheap but you pay for quality and that is exactly what you get. 100% recommendation.

The build quality is excellent; very sturdy. The device works exactly as i expected and i get a clear signal out from both channels. I chose this after reading plenty of recommendations in forums. After contacting Lehle I decided to power it with a standard UK stomp box power supply rather than get a Lehle one as that only had euro connectors.

I use it to to send my guitar output to both my physical guitar rig and directly into the computer so I can either virtually re-amp without losing that 'perfect take' or quickly lay down demos with virtual amps without needing to spend any time at all setting up to record my physical guitar rig. This workflow is brilliant for capturing ideas as you think of them without any fuss or even having to plug in alternative cables.