Product review (5 stars): Best part.
Essentially, you take your dryer entirely apart.  Not really hard at all!  You only need to keep track of all the screws you pull out.  About 20-30 screws.  Keep track of the lengths of the screws too!
Hook up 3 or 4 wires on the element and reverse the order!

Most importantly though ... it gave me the opportunity to clean out all the dust and junk that can accumulate within a dryer.  MANY areas outside of just the normal lint screen!  LOL!

Best part ... I didn't have any screws left over!  ;-)