I did not experience any hiccups. I do think that the performance improved (better power at low rpm's) after 200 + miles were put on.
But no idle issues or any other weird problems after Vanos seal replacement.
It is not a difficult DIY -- my recommendation is you take your time and don't worry about finishing up quickly. Also, since is it fairly cold up here in PA now, I left plenty of time for the RTV to cure before running the engine.