Everyone is rushing out to buy this disc so they can hear ID4 in DTS, so what is it like? Well I will get this out of the way now; there is not a great deal of difference between the Dolby track and the DTS edition. To be honest I was hard pressed listening to a number of set pieces and quiet moments on A-B loop and flicking between the two on the fly, to hear any major differences at all. I would go as far to say if you own the already excellent R1 Five star or R2 Two disc this replaces, then keep a hold of them as they are just as good in Dolby Digital. Many of the DTS fans will be shaking their heads saying my tests are not scientific and just my opinion and they would be right, but listening at reference levels and using the best equipment I can afford which is far from budget territory I simply can't tell the two apart, sorry. If you don't own ID4 then buy this in the two for £20 offers at the moment, if you own the film already then I see no point in buying this.