I'm sure the work that F-Secure did was very technically impressive, but I don't think this demonstrates that "these electronic locks may not be very secure" as the article states.

I'd imagine that there are very few commercial technologies that couldn't be hacked if you can get research on a working copy and throw "several thousand total man hours" of highly qualified researchers at it, including building a custom device. And the hack has already been patched!

And then the end payout is that you can get into hotel rooms, which are regularly accessed by low-paid hotel employees and generally considered not a secure place to leave valuables—there's a reason for the safes in the closet of every hotel room.