Since switching to Voluum has made running the reports for me a bit easier since I am so used to it. This campaign is doing pretty well.
The offer is just a simple push subscription offer from Monetizer for the US. I use the Monetizer smart fallback so not every conversion backs out to the same amount, but overall the performance has been pretty good.
Monetizer is definitely a network I recommend.
Also, PropellerAds is awesome. Don't let anyone tell you different