I just got my Lozenge decals from Reviresco and I was really impressed. They looks perfect and are surprisingly easy to put on (unlike Rodens decals, they are useless).
For $8 you get enough for at least 6 planes (12 Fokker EV/DVIII), perfect for anyone that wants to custom paint their planes or are buying unpainted models.
You have to paint the model in white first (I use warhammers skull white spray can) and then wet them (the decals) for about 8 seconds, then you just slide them over. I also use Humbrols decal fix.
5 out of 5, an easy way to make the german planes look great