It wholly depends on which features you were using from Resharper.
Personal experience: I've used both Resharper and Visual Assist X for at least half a year both, and in the end I went with this free package: Productivity Power Tools by Microsoft: http://visualstudiogallery.msdn.microsoft.com/d0d33361-18e2-46c0-8ff2-4adea1e34fef/
