The main drawback of this package is its price, it's a little expensive at stère (the price of rail quickly becomes Colombian ...). The two small curved rails are too constricted, trains often derail their passage. The switches are not mechanical but have the advantage of making the children less passive.
The reversibility of curved rails allows to turn either to the right or to the left, very useful these days ... Anyway, whatever the choice is ultimately turning in circles. For the sake of economy we can opt for other compatible brands (Ikea very cheap) but with a lower quality wood (ash harder Brio).