Really nice! Listen to what Mark says about plenty of room for landing. It has a motor and you can take off, go to 100' or so and practice an approach. Come by yourself at 20', for instance and you know that approach should have started further away.
Hit the power, take her up to 100' and around again, downwind to where you want to start the new approach, crosswind leg and then turning back upwind on approach. What altitude is she now when she flies by? By purposeful practice you can get a very good idea of the correct altitude and distance to begin your approach to land at your feet or thereabouts.
When you're new and have plenty of room, never force the plane to land on a given spot. Either you can live with going to get it or your hit the power and around again for another try.
The only thing that teaches this is repetition, and after awhile you'll learn to spot a few things.
First, if the plane is going to land at your feet, on approach the aspect angle of the plane stays exactly the same. The plane just gets closer. If you see the angle to the plane getting larger and larger (you see more and more of the bottom of the plane), it is going to land beyond you. If you see the angle getting smaller and smaller and you see the plane more and more from the front, it will land before you.
With a sailplane you can forget all about the set the sink rate, let her fly to ground effect and flare out. You just fly her straight and level until she touches down, literally flying her into the ground in level flight.
The Radian is just a ton of fun. It's relaxing because she's not trying to crater every second, it's challenging because the name of the game is the search for lift. And the plane is mondo forgiving.
Most of all, once you have some experience and feel comfortable at the factory specified 63mm aft of the leading edge CG, move it back to 70mm (I'd do this in two steps if you're a new pilot). At 70mm I found the plane to be directionally stable and still very easy to fly. BUT the sink rate fell in half. The stall speed was cut about in half and the plane was just plastered to the sky. It just about refused to ever come down.