Actually think it`s does a fairly decent job . The only problem with it is finding the right reference track. We use it in our studio for our "budget" low cost recording to keep the cost down for our customers and so far people have been very happy with the results . Engineers are going to hate it that’s for sure, well most will . Personally it save a lot of time in our studio as we have a lot of clients that come in record a few songs to backing tracks and don`t have a lot of money to pay me by the hour to master them properly, so this is a great alternative option to a) save our clients’ money b) allows us to take on clients on a tight budget and c)doesn`t cost a huge amount of money to buy. Finally , as you can load it up with wavs and let it get on with it you can get on and do other things making it a very useful tool in our busy environment. P.s. One more thing to mention. If you master a track yourself ,using Wavelab or whatever you use ,that’s going on a certain album you can create a reference track from that and then use AAMS to master the rest of the album using that reference track and for that is works very well.