I have personally found this very good for myself. Although i have Gaelic and can understand a lot of spoken Irish, the spelling of a lot of words is completely different and this is where this dictionary comes in.
It has so many words (Irish and English) packed into such a small space which makes it very comprhensive (such things as "visual display unit" and "inferiority complex" are included!).
However, the grammar side, at only 20 pages long, could have been a bit better - a table on the definative could have been good.
All-in-all, for £1.19 i could not have asked for much more. Compact, easy to use and read and very up to date - they even have words for "Xerox" (xearacs) and "zuchinni" (cuirseid)!!!