It looks very nice and works pretty well, however personally I don't see the point in these kind of apps.
They all let you send and receive texts from the app - but everyone uses WhatsApp or Viber or something else anyway.
They let you sync music, when a lot of Android users are going to have it synced via Google Music.
They let you edit contacts - which are already coming from GMail, Facebook, Twitter, etc. as it is, and they look all messy in the app because they're not all smartly linked up (in the SMS part of the app, a lot of the numbers don't even have names associated with them!) - what's the point?
They let you transfer photos - which a lot of users will have set to automatically upload to Google+ (or maybe Dropbox - I believe some HTC phones even have this as a default option) as it is.
They let you install apps from the Play Store - what's wrong with using the Play Store on the device? Or if you really must do it from a desktop, the Play Store website pushes apps to the device anyway. You list one of the pluses of the app as being that it can save your data plan as it can download apps on the PC. Surely the PC is going to be connected to the internet, and quite probably over WiFi - why wouldn't the phone be over WiFi too!? And you say it's a convenient way to sideload apps - frankly, I can think of more convenient ways.
Sorry to be harsh, but I've never seen the point of apps like this. Without tying into new cloud-based services which people are moving to (like WhatsApp, instead of SMS for example), their functionality is so limited and antiquated, there's just no point. These kind of apps are like having Palm Desktop HotSync (or whatever it was called) around again, if that's all they're going to do. As a company, you should think about that I think - especially as it's not clear how you're monetizing your business if you have 90 staff (!). Maybe it's working out for you already and there's a large majority of Android users who do want to indulge in this kind of old-fashioned manual management of data, but I just don't see the demand or need for this myself to be quite honest.