Well it all depends upon your life style, your coutry of origin and your position in the company.

Even on this forum people from third world country gonna read it and they gonna say its good.

On the other hand very soon you would see people from west saying that it is not enough and you should negotiate.

Life style is the main factor which would tell you whether it is enough or not. Search for cost of living in this forum and you would find out. If you want to live in a villa and rent / lease a car then it is not enough. However with a moderate living life style and 2 bed furnish appartment the cost of two people here in Doha is around 12~13K QR minimum. Rest you can figure out yourself by looking at cost of living forum.

You have two children and their education expense would also go from your pocket so you can live in this amount but you can not save much.