Neowin.net posted a news story that Winreview.ru posted a review on an early build of Office 15

While there is not a drastic difference in appearance, there are small updates that the reviewer points out. Things such as dynamic interfaces, small updates to align more with the Metro stlye, and that it is being built on NET Framework 4. The reviewer also likes the updates to Outlook and notes that there are new transitions in PowerPoint as well.

Finally the reviewer points out that the product is a good start but is far away from completion. There are still consistency gaps with application transitions and occasional crashes; all which you would expect to find in an early build such as this one.

  Microsoft Office 15 gets reviewed