Should I get a Muti Park pass for Universal Studios? (see description)?

I would get the single day pass. It would be almost impossible to both because during the summer the wizarding world is crowded and there are lines. When I went the first time last year I had to wait an hour in line at Jurassic Park just to get to Harry Potter because it was crowded. When I went to the ride I was in line for 3 and ahalf hours. There was even a line just to get into the shops. The second time I went they didnt have a line to get into Harry Potter but I ended up waiting about 2 hours to get on the ride. The lines to get in the shops were very short but there was about a ten minute wait. If you want to go to both I suggest going to Islands of Adventures then go to Universal but have everything you want to do there picked out so that your not disappointed.

Get both. I don't spend a lot of time at Universal Studios because they have a lot simulators. But if you like trill rides spend time at Islands if Adventure. If you like simulators spend more time at Universal Studios.

And your going to Harry Potter. It is still really crowded there. The best time to go is at night or evening since your taking pictures. So like 4. Maybe earlier.

The rides get shorter at night at Islands of Adventures. And in the mornings Universal lines are short,

I think if you want to really see all the harry potter world, its best to do one park, as there is still a lot to do in islands of adventure, however if you really want to see universal as it is the main park, just for a few rides even, i think its worth it, it has some of the best rides there, so it might be worth getting a ticket for both, even if you can't get on much, just go on the main stuff in each park e.g. the hulk, spiderman, harry potter in islands and terminator 2 3D, the mummy ride, E.T. Jaws. have fun.

= You can go in these are the link and get more details...

Southern California CityPass®

5 Famous Attractions for 1 Amazing Price!

Includes Disneyland®, SeaWorld® San Diego and more.

Each Southern California CityPass® includes:

Disneyland 3-Day Park Hopper®

1-Day at Universal Studios Hollywood

1-Day at SeaWorld San Diego

Plus your choice of 1-day admission at either San Diego Zoo® or San Diego Zoo's Safari Park.

Save up to $135 off the combined adult admission prices to Southern California's top attractions.

This is the best value for your Southern California vacation!

Your first visit must be made on or before December 31, 2011.

Ages 10+

Ages 3-9

$276.00

$229.00

It is possible to do them both in one day, but it is really hard unless you are a seasoned visitor. If you have been many times, have a plan, and know exactly what you are doing and where you are going, you can both in one day. Otherwise, I really would just recommend sticking to Islands only. It will be too stressful and not enjoyable if you are trying to rush to "get your money's worth."

i think that if you plan on staying from when it opens to when it closes then yeah sure you have enough time for both but if its like 8hrs or less you might want to stick to IoA. as for rides i have to say my favorites are dueling dragons and the hulk (i havent been on harry potter yet so yeah).