Hi Kev
I just got back today from the Holiday Inn I Drive. I can without a doubt tell you it's a great hotel. It's a Virgin Flagship Hotel which means free newspapers and discounts in the on site shop (which is a tad expensive but handy). If you are not driving (and even if you are are) the shuttle buses to Universal and Seaworld are excellent and always on time, the Disney buses also are to be recommended. I would recommend asking for a Tower Room though, they are massive, the noise from the freeway can be a bit off-putting, but then the resort rooms are lower level so I would imagine it would be worse in these!
Oh well off to get some sleeps now (only got about an hour on the plane). Enjoy your holiday and if you want to know anymore just shout.
V