I bought this for my two week holiday in Borneo. It was really useful, especially as it's small enough to fit in my pocket. I successfully used it to order myself a vegetarian meal at the marketplace. My boyfriend, who refused to use the phrase book, tried to order a chicken dish and ended up with squid and prawns, a very funny moment. We found that many people did speak English in Kota Kinabalu, even in the marketplaces, and if they, personally, didn't then they often had a younger family member around who did. However, I do believe it's better to make the effort to speak their language and this book is a great start for learning. Our guide did tell us that there are many many languages spoken in Borneo among the tribes and that, but I believe that this phrasebook is the official national language, so will definitely help you in the cities.