It would have been an extremely capable tanker, with considerable AT capability.
On the handful of occasions each month that it actually worked! I remember trying to get to Iraq in it once:
Outbound - First attempt aborted at around 100KIAS, second attempt got us to Basrah.
Return - First attempt failed to depart from Brize, 2 hours later the spare ac also went U/S.
That's an impressive 25% success rate. Still, maybe it worked first time every other day of the month.... Great aircraft in its day but that day has quite definitely passed.