Question for people who have successfully deployed the 3CX in Hotel/Motel application

[dseevers]

I have a customer that has about 12 hotels and I manage their phone systems for them. They are all different ages/configurations of Mitel SX-200's. They have a new hotel going in and are possibly looking at wanting to go to a hosted solution. They are a really good customer and they trust what I tell them but if we go this direction it will come back on me if it doesn't work like they want it too. My questions are, have you guys had any issues with the PMS and voicemail integration into the hotels systems. What have your customers responses been after installation, what if any complaints have they had. I would appreciate any feedback that you may be able to give me before I proceed with doing this.