This is a pro preamp. There are so many options nowadays and this is a very safe one. It is really versatile and sounds great. If you cannot get a great sound out of this thing, i promise you it is not the pre's fault!
I have owned a pair of them in my Radial 500 series rack for a year now and i really love them. Just looking at the build quality alone is so revealing to me. It takes up two slots, which kind of sucks, but the units are completely full of electronics. They did not want to compromise their product and trust me it paid off.
I also have a pair of A Designs P1s which i love and i use both these preamps for cutting a lot of vocals with a U87, Manley Reference Cardioid and RE20, depending on the singer. When i have the time, i run the vocals through both pres and pick which one i prefer. If i dont have time, i just plug into the Great River. It always sounds great. I have also cut a lot of electric guitar and bass, both mic'd and DI, and i love this pre for both. For clean guitar and acoustic, i often prefer the P1, but i would still be happy if i only had this unit.
Overall a real workhorse pre, and truly pro. Not just a more affordable version than a 1073.. Do yourself a huge favor and do not think of it that way. This is an amazing pre in its own right, and in the same league as Neve, API, etc. I find it sounds quite different from a 1073, and do not even think of it as Neveish anymore. It is simply a Great River, the way a Neve is a Neve, and an API is an API. Try one out for yourself and you will see what i mean!
Lastly i will say that there are products available that became so popular for one reason or another, like Neumann, Neve, Pro Tools, etc. People will buy them, because that's what they have heard is good or pro or standard or whatever. Some of these products, you are paying way too much just for that name brand. It's supply and demand people. Other products, like Great River, you pay just for quality. Don't get me wrong, i love my API compressor and eq, and my U87... I am just saying don't be blinded by the hype and sleep on an awesome product like this just because it isn't the single biggest name out there. Plus, do you really wanna sound just like everybody else??