The only problem is that the last part took so long that I experienced a severe fatigue and at the end just wanted to be done with it. It is a shame, because I didn't get to appreciate it as much as I could have. I actually dont think that area can be traversed in under two hours, and there's too much hassle to get back to "skyrim" for a breather in the middle of it. This makes it more tiresome than necessary. It also comes to mind that I haven't been back there later on because of the hassle
What's your views on this?
Edit: Sorry Blackreach is of course in the original game