This stone holds a special place in our hearts here at the shop as it was the stone we first learned on! After years and years of use, we still love these stones and highly recommend them to beginners. They are on the softer side therefore more forgiving if a mistake is made and are of high quality for their price. These guys require about 10 - 15 mins of soaking before use.
All of the whetstones sold at the shop are Waterstones, do not put oil on any of them, you will ruin your stone. Holding the knife at a consistent angle while sharpening is one of, if not, the most important thing to consider when sharpening; thus, maintaining a flat stone is of equal importance. Pick up a truing stone to maintain a flat stone in order to achieve the best results.
If your stones are super worn out and completely concave using a truing stone will take hours to flatten them. Consider purchasing a King flattening stone to get the job done quicker.