Yes I have one (I have an iPad too). This is the original Galaxy Tab, they have some new ones in the works.
I think it's quite nifty, the iPad is great, but this is more portable and practical. Plus it was way cheap, it's a lot of gear for the money.
The battery is good, just keep an eye on GPS running and so on. Better cameras than iPad2, but not great or anything. Screen is 1024 x 600 (not size suggested above), so actually has better pixel density than the iPad.
Apple has better apps than Android (especially more HD ones), but you can get under the hood and tinker, which Apple won't let you do.
NO FUCKING ITUNES is a massive plus.
Has 16Gb memory, and can accept SD cards to increase that easily. Plays TV shows well (see no iTunes above!). Can do a lot of flash as well.
Comes with satnav software, at least it did for me.
Also it's kind of a giant phone, which has comedy value as well.
Downside is that screen size and no honeycomb may mean it won't run all upcoming tablet apps. But has media playing, internet, email, sat nav and so on all covered.