Just taking a quick pulse from those that have applied Exchange Server 2010 SP2 and rollup 1. Taking you all the way to build 14.2.283.3.
Any issues that I should be aware of for those that have actually done it? How long aproximately was the install? Generally I have been told not to apply update rollups unless you required a fix that the rollup specifically addressed. However, looking over the fixes that rollup 1 includes, I am inclined to apply it along with SP2. Is it still the case that you need to manually remove update rollups before you apply the next service pack? SP3 when it is release for example...?