Ive had this app for a few months now, seems to work pretty good from the last version, more stable and easier to use. The only complaint is the selections for surround modes, I havent quite pin pointed the problem but switching between them doesnt seem quite right especially when I want 5 or 7 stereo channel, I dont think there is an option for that.
tbukta about DeRemote for Denon and Marantz, v2.5.1