I flew on the inaugural SFO-FRA A380 flight and back to SFO two days later. I found the ride quite pleasant, more than I expected and WAY more than on the 744s which are the only other LH Y experience I have.
Are the seats really more comfortable then other economy seats?
Than the 744? ABSOLUTELY!
Do you feel like you have MORE leg room?
Yes.
When someone reclines the seat in front of you is the meal tray in a comfortable position for you?
I didn't have much of a problem. The reclined seat doesn't change where the tray is. The FAs did ask folks to un-recline during the meals so that helps a bit.
When boarding this huge craft, is there more then one entrance or do all rows (50 through 94) board from one door?
We used two doors on the main level and a third upstairs.
Is there enough over head storage space?
Yup.
Is the service good, very good, OK, or lacking?
Depends on the crew more than the aircraft. I found that the front or rear Y cabin had better service than the middle two.
Specific to Frankfurt, where is the boarding area for this craft? What gates handle the A380?
I'm pretty sure we were out in C14-16 or something like that.