Hi,
Yep, well worth a visit.
There's a large shopping centre in the style of the Trafford Centre (or similar), that also contains the SeaLife Centre (not been so can't say if it's any good) and a huge supermarket which good for stocking up on supplies and bottled water for the week.
There is a Disney Outlet there but not a great deal in it, plus I don't think the prices are any different.
There's also a area containing different restaurants which make a change from the offerings at Disney - I can recommend the Italian.
Additionally there's a retail outlet villiage (bit like Cheshire Oaks but nowhere near the size) where you can get some bargains, I got a pair of Timberland shoes for £30 on my last visit. There's also a Burberry shop for the Chav's out there (sorry, couldn't resist!!).
I think a small Disney clothes shop is in the Outlet Villiage, but there wasn't a great deal of choice.
Getting there is easy, one stop on the train and I think it's 1 Euro each way.
Hope that help, but any specific questions please ask.
Cheers