Personally, my kids are in that school. Location not bad close to my house and overall is good compared to the local schools that I used to go to. I dissagree with Kanooza that says plently of arabic homework.. I am not sure which year your kids are in but my kids only gets arabic hw once a week.
Overall, I don't consider it as a bad school. The only thing I don't like are the students. Majority arabic & they love to play rough. So if you are the weaker one, then you will get bullied.
To me, getting acceptance into a school is harder than getting a job here. So if you are accepted to this school then try it out before you move to a preferred school.
I heard most of the school have very long list. Better schools which I heard are
1) DESS - need to hold British passports
2) Sherbourne
3) Park House
4) Doha British Montessori
5) Doha College
6) ASD ( American School of DOHA )

If you are looking for good schools then you will hear the list above mentioned by most people.

And lastly, I am also moving my kids out of the school. Not to say I hate EMS but just am putting them into better schools. If English is your main concern then going to school with more 'English' nationalities are always better.