angiodan ,
We did our stamping in Tampa this week.
Parked car in INS parking lot at 8:00 am. Drove out of the parking lot at 9:00 am.....
There's a line outside . There were about 10 - 15 people ahead of us at 8:00 am.
Took us about 20 mins standing in line to get in (they call for security check one family at a time). No prior appt. needed even though they have large notices in red saying take a prior appt. (caused me a bit of a heartburn to see that when we reached there...but its no problem if you don't have appt.).
Once inside,you get a token and sit. They have 5 or 6 windows but we only saw 2 officers working when we were there. Once we got the tokens, another 15 minutes wait till we were called to the window.
Officer only looked at the courtsey copy of the approval (original went to the lawyers).
Only took the I 94s out of our PPs. Did not take any old visa's / EADs from us. When I asked if they wanted them, the officer said no, I could throw them out now.
Then he took us inside another room for FP and stamped our passports. Total time taken at the window + FP - 5 mins.
Bit of an anticlimax if you ask me. 5 long years of wait and it was over in 5 minutes
Oh BTW, I don't know where you are coming from, but the morning traffic is bad all over (I-75 / I-4 / I-275) - so keep that in mind.