Received mine today. All verified correctly as having 1BTC value on blockexplorer. They have a very satisfying size, weight, thickness, and color. These coins are unlike the ubiquitous, cheap, lightweight coins given out by grocery stores, arcades, AA, etc. The struck side fits in very well with traditional currency, while the hologram side is stunning; like something out of a movie
. Eye-catching and quite beautiful. These coins are a great novelty and conversation starter, but I especially like that they're the real deal, not just a gimmick or souvenir.
Trust is a tricky thing. I have no reason to trust Mike Caldwell, nor do I have a reason to distrust him. The impression I've gotten so far is one of awareness and enthusiasm. Operating under a non-anonymous name and address helps to some degree. In any case, trust can only be built over time, it can never be asked for nor guaranteed.
Here are some photos I took with a few US coins mixed-in for comparison: