I had keyless on our new Mobile Suite. I thought terribly unreliable and wouldn't think of not carrying a key. There are only so many cycles in 4 double AA batteries . Half of the time I had to punch the code several times and other times had to open with key and start over. If you have to try several times you can see why the batteries don't last. The other thing about not carrying the key is you can't possibly know when the energy for the final cycle will expire.
That being said if you have five openings and a spare key in each compartment and don't mind buying 20 batteries a month it could be great. I also found that Duracells weren't HD enough.