This question is becoming an ever popular one among vacation home owners.  As someone who experiences first hand guest are quite pleased with the new keyless entry systems.  There are many variations of keyless entry.  Personally I think keyless entry systems that use codes vs. some sort of magnetic swipe like hotel keys are much preferred by guests.  With the code they only have to commit 1 simple number to memory.  There is no losing the card.  For many homes on the Outer Banks, Oracode is becoming one of the preferred types of keyless entry system.  It offers many advantages for both the property management company and the guest.  The #1 thing it offers home owners is the ability to audit who has been in and out of their home.

Perhaps the only negative with the Oracode system is that you seem to have to punch the numbers in slowly.  Other than that guests seem to enjoy the ease with which they can check in and out.  Often guests do not even have to stop at the rental company.  That truly saves the guest time and hassle especially if reaching the home requires them to get back in traffic.