My only real gripe with it is that it doesn't teach the script, which is very attractive and I'd love to learn more of (I'm using various websites as well as the short appendix in the BBE companion booklet to teach me it, but none of them are particularly good so the process is slow).
It attractive, but it's also rather difficult. Like most Southeast Asian languages, Burmese has a "deep" orthography. That is, spellings have hardly changed in the thousand years since the script was first adopted. The language, of course, has continued to evolve, so the mismatch between spelling and pronunciation can be significant (i.e. worse even than that of English, which is is only a half millennium out of date).