I have both AS4 and AS6 installed however I have not used AS6 apart from taking a quick look at it .. as it's quite different from AS4 .. I use AS4 as I installed it over a year ago and have jut recently got back into programming for micro controllers.. I am a self taught hobbyist programmer (I do it because I find it interesting) I'll take your word over the differences .. I did notice that it was based on MS's Visual technologies,I do however like Visual C#, so no complaint's there and the Inteli Sense is a huge help however the point I was trying to make was he should perhaps be concentrating on the language rather than the IDE