I've had my ultimaker up and running for about 3 weeks now and am fairly happy with the results but I'm hitting detail problems that I think are just down to the way Cura sets up the gcode. The photo is a good example. This is a picture of a model railway carriage - so long, thin walls, hollow and detail. As you can see - on a line level with the window(on the right) , the plank detail of the side (and around the corner) suffers for a few layers, resulting in a visible line.
I'm happy to switch to Nettfab if there's a good chance it will resolve these issues. To give an idea of scale - the photo is take an 20 x magnification, the window is approx 4mm high.