Definitely a user friendly interface!

I browsed click2mail briefly but didn't buy anything.

Browsing thru the website it doesn't really clarify as to what that could mean.

Podio is very customizable so it serves as the "central hub" or "interface" and creates the relationships between items.

The interface is really easy to add guests and the codes automatically expire.Wifi Locks were also a big selling point for us. 

I was browsing the internet today on the topic of the management of vacation rental properties and found this thread.

It's easy to use from an interface standpoint, but has a bit of a learning curve, as you're drawing in 3D at any given time.In my business, I'm currently using Chief Architect, having made the switch from AutoCAD about tree months ago, and I LOVE it.  

Do you want to have IDX interface?

I'm finding that I have too many work arounds to make my business fit into their system.The interface is frustrating, and the reporting just doesn't work well for my needs and business set up.  

If you're willing to get down into the weeds and learn just a bit on the way, all the tools Google gives you makes it hard to beat Google Sites IMO.The interface isn't nearly as intuitive as Squarespace, but I'd say its at least as easy as Wix and you can do much more.