I used it throughout the 1990s before being switched to Lantus. (I've never had consistent control with Lantus, so I finally switched to Levemir 3 months ago, but I seem to have a minor allergy to it).
So I am going to ask my doctor if I can go back to Insulatard. I seemed to do quite well on it as far as I can remember.
I used Insulatard until 1997. I was getting a lot of nighttime hypos and was switched to Lantus to stop them, which it did. I have been lucky not to have any problems with Lantus.
Never really had good control when using Insulatard, a better option is to switch to levemir or there's a new basal insulin out called Tresiba, I believe Treseba is in a U200 strength as opposed to standard insulin's that are U100.
Edit, A quick Google search says it's in both strengths.