I already have the larger Beech model of this instrument from the TKP range, which I liked. This one is much better, although slightly too small for perfection.
The ridges on both TKP beech güiros are small and give a good clear sound, allowing for a lot of detail and tonal range. I recommend a plastic chopstick with a round point and a square butt for the greatest variety of tone. The stick that comes with it is not the thing.
The best bit of this particular model is the slit, which really makes the sound come alive - there should be a slit on the larger model too!