We need new windows? Crystal windows quoted �5200 is this good?

Hi, we had a man from Crystal Windows here today who gave us a quote for our front window which is big 1500 by 2300 cm i think, french doors on the kitchen wih a cat flap 2000 by 1800, new windows in all three bedrooms1000 by 1200, 1000 by 2300 and 1000 by 1800 and 2 little bathroom windows. The front window will be split into 3 and will have stained gl roses in each of them and a 10 year guarantee. is this good?