I've had my Kuat NV Core rack for a little over a year now and have been super pleased with how much easier it has made transporting my bike not only the trailhead, but everywhere else in between. The design is tried and true, super fast, and will work with whatever wheel size religion you belong to.
The NV Core, much like it's bigger brother the NV, boosts wide, long trays to fit kids bikes all the way to DH bikes with a long wheelbase. They look very similar, but there are some distinct differences between them. The Core is a lighter weight design based on the spacing between the trays and the lack of repair stand. I haven't weighed mine specifically, but I would say it is near 40 lbs and noticeable lighter than the NV (WAY lighter than a Thule T2). More on the spacing, it is 10.5" compared to 13" on the NV, I seldom run into handlebars hitting saddles on mountain bikes, but it can happen. I'm the type of person to remove the rack if I'm not going to be using it each day so I would rather have lighter weight that have to adjust a saddle height once in a great while. Next, the NV Core come equipped to work with either 1.25" or 2" receivers which is really nice in case you sometimes use different vehicles (or in my case, sell your SUV). Removing slop in the receiver is done via a threaded pin whereas the NV utilizes a tool-free adjustable cam. This rack offers extremely quick on/off's for the bikes which makes it super easy to get to the trailhead in a jif and home for dinner in time. I would highly recommend this rack to anyone looking for simple, no frills bike rack that is made to last for years to come.
Side note: I did add locks to mine for additional security. They can be purchased through Kuat directly for $39 (Pin & Cables). They slide into the rack so they are always there when you need them and make it simple if you have to stop for groceries on the way home from a ride and want some extra piece of mind.