So. I took part in my first Rebellion in the Rim games today, a 3v3 campaign. Two of the imperial players had an ISD (a II and a Kuat), the third didn't. Nobody managed to put significant hull damage (i.e. anything but ramming) on the ISDs and their players won both engagements. In fact 3/4 of those battles were such margins of victory that the imperial commanders have loads of XP to spend and lots of upgrade points and strategic tokens for the long game.
Granted, I suck, but is the ISD just too good in this format? What are other folks experience of facing them in 200 point or RitR games?