I've been once and would love to go again...
Since you will be busy at your reception and it will all be a blur..V&A would be a lovely calm, romantic way to celebrate your nuptials. You will feel like a princess and be treated like a queen.

rincess:
It is price fixe which makes it easier to enjoy all the courses--you know ahead of time pretty much what the bill would be. We did the wine pairings--and as I'm not a big red wine drinker--most of my dishes had red wine. Perhaps order a bottle of the wine you might have had at your reception or try something new. Otherwise--the meal is great.
They do have a vegetarian menu that I didn't know about until well into my meal. I'm not a veggie--but I think I am a wannabe one--in any case--I had alot of trouble choosing a main course and knowing in advance of the veg menu--I could have had a better choice dinner as most were red meat and fish choices--and the white meat choice was an unfamiliar fowl. They brought me a veg menu to see if I wanted anything--but I was eating just fine up until that point and didn't need to order from the veg menu.
Our table was by the harpist which was quite nice. Hubby forgot his jacket and was able to borrow one at V&A...so if fiance forgets his, no need to change plans or run out and buy a coat.
I highly recommend it especially since it is your honeymoon.
I have also heard California Grill is nice--it is at the top of the Contemporary and you may be able to get a reservation by a window for the evening fireworks. I have never eaten there, so you will need to solicit opinions.
Perhaps since it is your honeymoon at Disney afterall--Do both--you won't be visiting those places when and if you have children--at least not for a while