This quadrilogy has a MASSIVE value for this small price! I still need to finish MW4 but it has been a great experience!
The updates that those versions have are very nice, too!
True masterpieces!
They show the evolution of the programmer from "outstanding" to "godlike"
You should also get MW Ultra but play MW1 before to get that ultimate "wow-effect" ;)
And to be honest: Get Hessian and Steel Ranger cause they show even more how Lasse Öörni improved his skills.