Alice,
As I said I have 4 plants all sited in different areas of the garden, 2 in dry areas, where they get little or no water during the summer, and 2 that are on the fringes of irrigation for fruit trees. The latter 2 have grown a little more than the others but none of them get much water at all. They are also in full sun for large parts of the day.
They grow in a variety of habitats here in Cyprus as your reference suggests. From pre-desert scrub to cypress and pine forests with everything in between. The Forestry Dept propagate theirs from seed so if you can get hold of any it would be well worth trying.
It has been around a long time, seeds were found in the 4th century BC ruins of Salamis (now in the occupied north). Pliny (23-79 AD) mentions the styrax resin obtained from several regions; "...from Pisidia, Side, Cyprus and Cilicia, and that from Crete is rated lowest; that from Mount Amanus in Syria is valued by the medical profession, but even more by perfumers".
The fruit is a globose drupe, 1-1.5 cm across, and these were crushed and used to kill hair lice. The pulped fruit were also used as a narcotic agent to stun eels in the mountain streams so that they would be easier to catch.
So, you see as the old saying goes; 'it's not just a pretty face'.