Having taught myself in Qatar for a number of years I know it is still a relatively new school here in Qatar -on the go for about 2 years now.
Know a couple of Brits who work there - like all schools it has its politics but generally if that was the place you were able to get your kids into then don't worry they will be ok.
I assume you are supportive of your children's education so reinforce at home what they do in school.
The greatest education of all is life!