This pedal is really just 2 pedals in, The Holy Grail Reverb and the Soul Food Distortion. They are really good pedals and having them together is better if want to gig with just this one pedal and you save some money instead of buying them separated. The send and return lets you put the reverb after the pre on your ampli if you have and fx loop on it and you can even chose with the central switch the order of the pedals. It uses a lot of electricity so if you don't want to use the included brick make sure that your pedal board power brick can handle this pedal.
The distortion is really good, from soft to kinda dirty. The reverb has 4 settings that in almost every case will be enough.