I haven't had a Musikraft neck, but I will. I bought a body from them, and it is an amazing 2 piece ash masterpiece. Sounds incredible and the grain patter was out of this world.
I think Musikraft shines in a couple of areas. One is how many options they offer at no additional charge...more than any other maker. Two is the cost of premium woods vs other makers. Three is they finish the necks in nitro if you wish, which is a HUGE plus. They also roll the fingerboard edges, either medium or heavy.
I speced a premium flame maple neck, premium flame maple fingerboard, abalone face dots and side dots, jumbo wire, dual expanding truss rod, skunkstripe, asymetrical neck carve and heavily rolled fingerboard edges...finished in nitro for $400. You can't get that anywhere.
Musikraft makes enough necks and bodies that their quality has to be pretty good. They supply a lot of necks, including Fender necks. I can 't speak to their customer service because I've not had an issue. I ordered online, then sent me an e-mail telling me how long it would take, and the body showed up exactly when promised...and perfect.
Look at the prices at USAA and Warmoth. Perhaps for a standard wood neck with limited options these two might be a better deal, but for something special, Musikraft all the way.
I might also add that I am a HUGE Warmoth fan. I worked closely with them on the Forumcaster, and have ordered several things from them. Great company with great service. They are just plain too damn busy to do anything really custom, and price the premium wood for necks AND bodies too high...IMO.
Here's some pics of the body. Fabulous work, and this is finished in trans white by our own KMCGuitars.