I don't feel ofended at all.
I would say that University teachs a lot... but not all of it practical (be it in Spain or in any other country). I can't compare the IT degree in UK although for sure there is more variety of subjects you can choose from. UK Universities have always had a good reputation in Business and Administration, and related topics such as Marketing. Not so sure about its reputation in IT.
UNED does have an old program as well as many other Universities and, to be honest, compared to the Bolonian plan, I'd rather prefer UNED's old program than the most recent in other Universities. A University really teachs you to learn, giving you a good base to learn whantever it takes later.
Regarding the books poorly explain, it is always harder to learn from a book and by yourself than when you have lectures and classes and a tutor to guide you. It is like everything in life... when you understand it it is not that hard but when you don't... it is a mountain! Of course, there is always room for improvement and that something that I hope they work on. But some books are more than OK.
The online campus needs to be improved, in my opinion, but it does the job and works well even if it is not pretty.
Now, if you can afford going to a real university in UK, I would highly recommend it because you will enjoy the experience very much. You will not work harder. Nodoby will make you work if you don't want to. Furthermore, UK universities leave most of the work up to you and they don't have as many lectures as Spanish ones. It is completely up to you what you do. But it costs an arm and a leg (and maybe an eye and a kidney) to study there.
In truth, the only University I heard of with a good reputation for IT is the MIT in US. You can download some of their courses in iTunes