As far as Delsane is concerned, I'll be brief: it's a full featured delay with an unusual feature that allows it to creates fx not available elsewhere. I haven't used it in depth, but first impressions are that it compares favorably with much more expensive and well known competitors. That said, I didn't find the controls for the the 'Disrupt Sphere Slider' intuitive. But at the price, it's a steal - and I got it at Black Friday pricing.
Here's the thing. Rob Papen's pricing structure is bizarre: buy any four RP plugins, and you can get Explorer 8 - the latest complete pack of all RP plugins - for a rock bottom price. I checked my Reason account, and found I already had four from a Reason bundle I picked up a couple of years ago. That allowed me to get Explorer 8 for just $74 (again, Black Friday pricing) - which is one of the best bargains I've ever had.