Product review (4 stars): Looks like the original, just a little tricky to install
Our 20-year-old Kenmore dryer was still working fine, but the old seal had fallen apart.  Replaced the belt & rollers & tensioner at the same time for preventive maintenance.  I was hoping that replacing one of these might help with the squeaking, but it still squeaks.

To replace any of these items, you need to unplug power, but you don't need to move the dryer (vent connection can remain connected).  After removing the lint screen and some screws under the lint screen, the lid separates at the front using a putty knife and swings up.  You have to hold the lid up the whole time, so I attached some bungie cords to hold up the lid to the cabinets above.  Then you have to disconnected a few wires and there are hex-head screws holding the front of the dryer to the sides.  After removing the screws, just lift up on the front of the dryer and it comes off, allowing the dryer tub to fall forward (just held in place by the belt).  The belt tensioner under the tub can be removed to loosen up the belt, but it's spring loaded and it isn't screwed down, so pay attention to the orientation before allowing it to go flying.  After the tub comes out, vacuum out the dryer.  The old seal needs to be scraped off (without removing the paint), and the new seal should be test-fit before opening the glue (which is basically contact cement in a tube).  I had the tub sitting on a towel with the seal side upwards, and went around the tub lifting up about 1/3 of the seal at a time, applied the glue, and pressed it back down into place.  Afterwards I flipped the tub so the seal side was on the floor, to help press the seal in place while the glue dried.  While the glue was drying, I replaced the rollers while I was at it.