no, no limp mode.I thought you'd had an issue with limp mode or something??
spanner came on once when I was dumping the accelerator, I know it should not do it (spanner) but not 'normal' driving really.
had no other problems what so ever (now I have said it!)
only going on superchips read out on their site, it surely feels a lot more than just 15bhp increase.
my times were 6.19 before 5.59 after so not a million miles from 'womble' but how reliable the RS monitor is, is anyones guess.
not trying to course any problems, but just thought it was blanket statement, not everyone has had a bad experience from superchips, I assume your map from superchips was a while ago, so assume they have reworked it, that what they told me anyway.