I like when reviewers give their background,what they've worked with in the past etc.This way you know exactly what bowl of experience its coming from. Having said that, I'm a touring acoustic guitarist since 1980. In the most part as soon as a product comes out I tend to want to test it. I'm going to refine this review to make it clear that this unit by is far appropriate for 99% of the acoustic guitar population tough to beat for the money and well worth it. The Reverb is simple and well-thought-out they obviously picked a very popular setting oh, quite nice actually. The preamp section is surprisingly good with a warm touch to it, specifically good for taking away that piezo bite. And finally the compressor which although is good makes for the four star instead of five star. Overall this really should be a 5-star rating but I am writing this review for other touring professionals that may be considering this option. It is the slightest bit noisy on the compressor side,a good setting can be dialed in,it does its job,warms things up,punchy but overall it's a little bit noisier than the higher-end units but considering this is a 4 in 1 unit..its a no brainer. As a comparison my last record was with a Universal Audio, Avalon and a Neve preamp. Somewhere in the 5k zone,is this unit as good? Ugh no! Is it day and night...ugh NOT Really.The Tommy Emmanuel and Phil Keaggys of the world would probably have something to say(both of who I've played with) Me? I like it.So where would a slight noise of the compressor be a nuisance, in a pin drop acoustic Auditorium type setting and direct connection for recording a pristine album( which you'd want to use a top notch compressor anyway. In your standard Rock concert setting it would have no impact whatsoever.for live,outta the box,very impressive,worth the money ABSOLUTELY. Hope this helps.