We did it the very first year we were there, but we were supposed to drive. In the time it took us to get from the airport to the hotel, my mum refused to drive any further; she didn't want to drive to the hotel three doors down to return the car! Anyway, we went the first time purely because we were new to the area and we werenow carless and needed to find out best way to get around an dstuff.
Oddly enough though, our mum drags us to the meeting every time we go now. Although it was worth the effort this last time since Virgin have started their own taxi service between certain hotels and Disney that is cheaper than arranging with the hotel and they are more frequent (like every 15/30mins rather than every hour) and the times are better.
I expect very much that we will be going to the welcome meeting when we go in the summer, as it's our first time staying on-site and this time we will need to see what arrangements we can put in place to go off-site, and I think we're leaving the Universal tickets to buy when we get there are the welcome meeting, although I should investigate if it's' cheaper to buy now, rather than when we get there. I know this year's prices on their guide sheet from the meeting were pretty much identical to buying before you went. Only thing to your advantage buying when you arrive could be the exchange rate.