We are using Parakeet in 30 units, and it´s amazing. We installed as well their thermostats and we can control both from our self phones.
Our platform generates an e-code for each booking. Also each housekeeper has its own e-code. If someone from our organization (housekeeper or site manager) enter into one of the properties after hours (you choose the operational hours) Parakeet sends you a message alerting of it. That means that you have full control of who is entering and what time.
Also, if a guest (or someone else) is trying to enter using the wrong code, Parakeet sends you an alarm informing. That way, you can contact your host immediately, ask him/her if he´s having some issues and provide him/her the right code..... or open the door for him/her from your phone.
We are very happy with Parakeet!
Ahh! And I forgot to say that their system has as well noise control, that means, that if your guests are celebrating a party (I´m in Miami and this is Partyland.....) you can immediately call them and advice that will send the security... or at least scare them a little bit!
Hope this helps!