I hope this catches on, since it really gives internet music a whole new meaning. Passport Encore seems to have an annoying habit of corrupting data when you cut and paste. After a few attempts, it does it correctly. Formatting is difficult with Encore to say the least. You have to manually specify how many systems per page and how many measures per system, then decide on the size of your score.
Empty bars crop up all over the place in the course of editing.
Selecting whole staves can be a nightmare. You have to click twice at the beginning of the stave. The problem is, you can very easily just click once, which selects the stave on the current page, only it looks like it has selected the whole stave. If you then go editing, like changing key etc. Transposing parts is not easy either.