opinions are like...
I'll come in as I just got a nexus 7 for Christmas. I've wanted to enter the android world just to satisfy my geeky side - but here's my disclaimer that I'm an apple fan girl
I think android with the latest jellybean is ahead when it comes to text input. Auto correct is superior... I prefer the multiple options as you type. I also really like the swipe (swype) option/capability... And actually hope it's something we see with later versions of iOS as we move into the future.
I think the cursor and cut and paste function is slightly better on android... But the magnifying glass of iOS has always bugged me.
I have very few apps installed so far on the nexus, yet battery life is clearly inferior to my iPad mini... By quite a bit. I've turned off Google Now and that seems to help, but also removes one of the neat features.
Some of the apps themselves, common ones, are simply inferior. Facebook and Google plus are two that come to mind. They are much nicer and more refined on the iPad mini. Part of this is like due to the apps on the nexus being blown up phone apps... But still.
And speaking of apps, they crash on the nexus more. I have very few problems with apps crashing on the iPad... In just a few days of using the nexus I've had quite a few app hangs, a couple of app crashes and two complete unit crashes needing a hard reset.
I'm very integrated into mobile me/icloud... And the geek in me was able to track down apps that will sync my calendar and contacts, but I wonder how intuitive that will be for others if they want to switch. I found the whole experience less intuitive on the nexus actually. Syncing my music, photos, videos, books, staying in sync with contacts, bookmarks and calendars.... Its all a breeze on my iPad... Not finding it as easy on the nexus. I know some stuff can just be dragged over like a regular file system, but when you have a lot of stuff to keep synced that isn't always the best way to do things.
Customization is neat... And fun on nexus, but honestly, over time I'm not sure how important that is... Or even really that useful.... and especially if some of those neat widgets just kill battery life.
I think I like the size of the nexus better, but only if used in portrait mode. Once you switch to landscape I think the iPad is better for overall use... iPad is lighter.
I'm not a fan of the OS nav buttons on the nexus permanently taking up screen real estate, but I like the quick app switching. I've always worried about the button on the iPad/iPhone not holding up to all the double-clicking (though it hasn't proven to be a real-world problem for me either).
I find the calendar app on iPad better. Google one seems a mess to me... and I hate that it doesn't like to show you one day even when you tell it to.
Another thing that bugs me with the nexus, which seems like such a minor complaint, is the lack of a "return to top" shortcut that is so common in the iOS world. I didn't realize how much I used it until it wasn't there. I even asked around to some other android folks because I thought I must just be missing how to do it, but really, it appears to not be there.
All that said, if someone asked me if the nexus was a decent tablet for $200-$250 I'd say yes. I'd also tell them if they have the money to spend a bit more to get the iPad. Overall I think it's just more polished and smoother... But the nexus 7 is proving to be nice in its own right. There are pluses and minuses on either side.
(Typed all on the nexus using swipe method LOL)
Amy