For those in the UK jumping for joy at a Stripe like payment gateway there is a bit of a gotcha it only supports Euros.
Also there is no details about who is actually processing the payments and several interesting and dubious (but again could simply be translation problems) statements about PCI compliance on the site which could make due diligence interesting.
Something to watch, but for UK merchants I suspect it may be a lot of work to get going so not quite the frictionless option people are holding out for. Be interesting to hear from a German companies perspective to see if similar issues exist on the paymill.de site?