This is the best dictionary on Thai I have seen to date, and I have looked at a lot of them. Although the transliteration
system (The Romanized version for English speakers) is probably the most unique and difficult to learn and remember, will easily result in the most accurate pronounciation. The transliteration system is worth learning, and puts all other transliteration systems in second class (as far as winding up with the correct pronounciation) at best.
The book has English-to-Romanized-Thai, Romanized-Thai-to English, and "real"-Thai-script-to-English, easily making
it the most useful of all the ones I have seen to date.
As this dictionary is fairly comprehensive, it is also a bit thick, making it a little difficult to travel with, but this dictionary is a MUST for anyone trying to learn any Thai at
all.