I gave this a go last Monday. I decided to start small and cut an 800ug blotter in half and placed one half on my gum and gave the other to a friend who did the same. A metallic taste was noticed, and my friend became sick of it after 15 minutes or so and removed the blotter. I kept it in for 25 minutes before doing the same. The effects were expected to be mild, but to be honest, I hardly felt anything.
Both me and the friend said it was a feeling akin to smoking really nice hash - Stoned, but not sluggish. This persisted for a couple of hours. Very slight visuals were noticed if I was to stare at something and zone out a bit, similar to coming up on mushrooms ("Is that moving or did I imagine it?"). This didn't last long. It should be noted that I had been smoking some weed both before and throughout the experience, as well as consuming beer (although not fast enough to get drunk).
Overall I was disappointed after hearing many good things about this substance, even at lesser doses. I plan to do it again this coming Monday, but with a whole blotter (I also plan to leave it in for longer, that taste really isn't nice though, especially when you can't swallow). I'll be smoking less this time as well, it's a possibility that the weed clouded the experience somewhat.