I was in the same boat. Loved Windows Mobile all the way back to the Treo 700w. I have used every OS in the book. My current device was a Galaxy Note 2. I loved it but had some issues with voice search and voice commands not working while Bluetooth was turned on. It is mostly a Samsung issue that they don't want to fix. I had tried the 8x when it was released but needed more storage than 16GB and wanted a larger screen. I was so excited to hear about the 928 and picked mine up opening day at 9am. I have had almost 4 days with it and here is what I have found:
The OS is nothing like Windows Mobile or Pocket PC's. It is fluid and smooth but lacks so many really necessary features that Windows Mobile had.
1. No file access or management capability.
2. No instant HTML viewing of emails (must download graphics and attachments manually every time).
3. Very limited email capability. No attaching of documents from within an email, only photos. This eliminates the ability to reply to an email and attach a document or start a new email and attach a document. Very limited for a Microsoft device that would be designed for business productivity.
4. Unintuitive multitasking. Why can't I just swipe an open app away or click an X to close. I have to keep hitting the back arrow until I close all of the programs. Very janky.
5. Screen standby is only 5 minutes max. This will probably be fixed in a few months with an update.
6. No notification system. This is a known problem with Windows Phone 8 and one that Microsoft might fix down the road.
7. Less than average camera. I have taken over 50 pictures with both the 928 and my Galaxy Note 2 on automatic settings and stock camera apps without making adjustments and there was only 1 picture out of 50 that the 928 took a better photo than the Note 2. That really surprised me as I was expecting this 928 camera to blow the Note 2 away. I will be posting some comparison pix next week to prove my point. Most of the pictures were not even close. The 928 was always yellow when the Xenon flash was used and the colors were not accurate and oversaturated. The Note 2 gave much better color representation and crisper, clearer images.
8. Shortage of Apps. We all know that is the case. I could not find even one decent weather radar map that could compete against what I have on my Android device.
9. Battery life is still not quite there. It is definitely better than the 8x, but I still can't make it through a full day without charging. Off the charger at 6am and need to charge it by 2pm and then make it to about 10pm. That is 8 hours which is what most users want but my Note 2 can make it a day and a half without a charge.
I love Windows Phone and hope that one day it will catch up to the competition, but after trying the 928 there are just too many short comings to switch right now. Maybe 8.1 will bring all of the changes that are necessary, but right now I need a phone that can handle heavy business needs and Windows Phone just can't do that. If you want the 928 to record video it is excellent at that. It has an excellent screen and the loudest outgoing speaker on any device, bar none. The incoming earpiece speaker for calls is not very loud, the Note 2 is much louder. I would certainly recommend that you try it out. It might meet your needs perfectly, but I have to switch back to my Note 2 until Windows Phone advances further.