Honestly I think it's a great service! I joined because after moving to the south from New York City, I didn't have great access to Japanese candy anymore. I got a lot of cool goodies that I wasn't familiar with before. I ended up canceling because of both cost and unreliable shipping (not bemmu's fault). I only ever missed I think one shipment but my local USPS would really badly mangle them and deliver many weeks late.
I think boxes would be a great value and I would seriously reconsider subscribing with those, not just because of less risk of damage but the ability to send crisps. Japanese crisps are of "high value" to me and I was kind of hoping bemmu would start an alternate service just for those. Some of the candies that would ship I'm not too fond of (like the rice cake panda thing that has to be made that was shipped twice) and my favorite candies I can get on Amazon (evaporated milk candies are OMG AMAZING).
Also, a quick welcome package is a great idea. I ended up waiting almost 2 months in the mail for my first shipment..the longest wait out of all of them. Such anticipation!
Anyway, highly recommend anyone interested to try this.