Another user of pinboard here (not a heavy user though). Are there any other examples of services that are simple and just work? Seems like this is the holy gra

Another user of pinboard here (not a heavy user though). Are there any other examples of services that are simple and just work? Seems like this is the holy grail of SaaS - a simple service, barebones design, something that just works out of the box, happy customers. Great service.