It'* fairly easy to say the least.
I for starters take a #2 Philips screwdriver and remove the plastic covers at all 4 corners of each seat (total of 8 for front) and seat belt clasps' base just behind the seat on the center hump.
From there it is just a matter of a wratchet with either a 13mm or 15mm socket.
With seats moved all the way forward remove the rear bolts. I believe there are 2 on the outer mounts for each seat, and 1 for each center - so a total of 6 bolts for the rear of the front seats.
When the rears are all out, move seats all the way back and remove the front bolts (don't know if there is 2 or 3 total for each side of the front seats (should be easy to see as they will be right next to each other if there is more than 1)
Then tilt the seats back and find wiring connectors for power seat(*).
Be really careful to remove from car so as not to damage any other parts. (I'd suggest removing the lower portion of the rear seat prior to taking the front seats out of the car through the back door -which might be easier than through the front doors).
For the rear:
Grab hold of the back of the lower section and lift up so as to pull it in front of the lower part of the back support.
Then give a good solid push at the bottom/front of the lower cushion and you will feel it release (there is one 'catch' on each half.
The lower section will then lift right out of the car (takes me about 20 seconds to remove the lower section).
Next have an 18mm (?) socket on the wratchet and remove the nuts holding the seat belt restraint'* down near the center hump.
Lift the seat belt parts from the studs.
Then, using a pliers or vise-grips remove the thin nuts on the wiring harness retainers, between the inner and outer seat belt studs.
Lift wiring harness retainer from the studs.
Make sure shoulder harness belts are to the side so they are not in the way of the seat back being lifted up.
Grab hold of the bottom of the seat back and lift straight up (going with the incline of the seat back anyhow) as there are hooks on the back of the seatback that slide into slots in the rear dash.
For re-install reverse this procedure.
Cheers!! Oh, and lots of pics (I'll probably be doing the same when I swap in the AL7 seats soon).