Rich Murray at Modern Guitars Magazine had this to say about the Alex Machacek, Jeff Sipe and Matthew Garrison collaboration, entitled Improvisation, "Simply put, this is one of those rare albums that gets everything right. The playing from all involved is cutting-edge, and the compositions themselves are very deep, yet approachable. A lot of people are going to call this music "fusion". That's not an incorrect label to use for Improvision I guess, since it will get the point across. However, to my ears, this is jazz. Not straight-ahead jazz mind you; it's no-holds-barred, in-your-face, new jazz. Yes, all the hallmarks of fusion are here, at least on most tracks - heavy grooves, distorted lead guitar, advanced harmony, etc. But there's something about the writing on this album that transcends most of the "fusion" I've heard lately. This is an extremely impressive recording that is bound to turn more than a few heads. I can't recommend it highly enough." Instrumental Guitar (Electric/Fusion/Jazz), total running time, 54:55 - Machacek/Sipe/Garrison @ iTunes!