I've owned both the Source Audio Ventris and Nemesis units, as well as many other reverb and delay pedals. This is the best solution so far.
The sounds themselves will be familiar to users of Ventris/Nemesis, because they are a selection the most useful algorithms from those pedals. In short, they sound absolutely stellar.
The pedal is easy to use from the physical knobs, but don't forget to try out the excellent PC (or mobile) editor where you can tweak and manage presets. The interface and options in the editor has been simplified from the Nemesis/Ventris units - but that's a good thing! Unless you really need (extremely) detailed control over every little aspect of your delay/reverb then you will likely prefer this simplified set of controls. There is enough to dial in exactly what you need, but not so much as to overwhelm or confuse you.
But the best feature, which alone makes this pedal worth the upgrade, is the ability to run delay and reverb in parallel. This is a well known studio trick, and now you can do it with pedals. It makes your overall tone much, much clearer and you can hear both the reverb and delay without any mud.