$79 is not bad. PG gave it a good review.

Buy if...
you like to stack drive and fuzz pedals, but can’t deal with wild feedback problems.
Skip if...
you need a traditional noise gate to cut out background hiss from a noisy amp.
Rating...


Also found this explaining the difference between their Smartgate and Noise Clamp:

1- Smartgate - you put this after your noisy pedals. The volume of your noisy pedal outputs have to cross a threshold for the Smartgate to open and let the sound through. This means that if your pedal noise changes (like turning boosts on and off) you'll need to set the threshold of the Smartgate pretty high to block the worst-case (highest) noise. This means small signals (all your boosts or distortions before the Smartgate are off) won't pass through the Smartgate and you won't hear those low volume signals (a bad thing).

2- Noise Clamp - you put your noisy pedals in the loop of this pedal. You use your raw guitar signal at the Noise Clamp trigger (threshold) input. This way you can have any combination of noisy effects on or off in the Noise Clamp loop but the volume of your playing level that triggers the Noise Clamp threshold to let the sound out to go to your amp is consistent. You'll be able to pass both quiet and loud notes from your guitar to your amp.