I bought this dictionary without really assessing the market because I trusted an Oxford dictionary to be the best. Since then I have used the equivilant Collins-Robert (CR) dictionary in school, and while that in itself is very good, I'm still glad that I bought Oxford-Hachette. The typeface is clear, it has a vast array of sample letters, bills, contracts etc. in the middle section to assist people such as students who are going to live in France, and most importantly it has a HUGE range of vocabulary. Despite being cheaper than CR, it actually appears thicker, and it also comes with an accurate pronunciation CD-ROM. There isn't much to choose between them in terms of vocab, but I'd choose Oxford-Hachette over Collins-Robert simply because of the many helpful extras and it being a bit cheaper.