The hosted platform is the easiest to manage and modify. I've enjoyed using it over the past 3 years and the feature set has only grown, with the costs staying the same. Versature recently added Transcribed Voicemail to Email. It's worked pretty well. I can make/take calls from my extension and using the Bria app which can be purchased or paid monthly. I can also have the calls ring simultaneously at my desk and app which I can transfer to other users at my company. Call quality has been stellar and their support have always been helpful.