It depends what you want to get out of it and what your current skill level is.
I'm sure it will be a great resource to teach you the basics of Unity and point out some of the issues you may run into when making your own iOS game. But it is something you could probably find elsewhere for free with a little hunting and self motivation.
It also depends on what you want to learn about game development, it looks like that is mainly covering the small iOS games ranging from design, asset creation to programming. If you would rather focus on one area of interest then just go for that.
It doesn't seem bad for the price but I doubt any one here as actually used that website so you won't be getting a decent opinion. If you have free time and no real grasp of how to make games and you just want the basics laid out for you along with a decent resource to go to then I would suggest going for it!
