Hi Frank,
I thought a long time before choosing Tysabri. Now I'm glad I did. I feel much better than I did on any of the shots, and so far my symptoms have let up, I have more energy and more strength too. No more shots either which is just a nice convenience.
From what I recall, you have a good neuro too so I'm sure he'll keep a close watch on you for any signs of PML.
If you decide to take Tysabri I hope you'll get good results.