i done mine last friday, after about 15-20 hours, 4 or 5 of those being circuits as there are 4 different circuits where i fly and the weather has been erratic.
to be honest i worried about it so much that i was completely underwhelmed by the experience. it just felt like another circuit. pity the weather turned out to be so bad on the solo.
most of the time i was doing circuits in 15kt crosswinds, i guess the instructor had confidence in me to fly the aircraft.
for me the biggest part in all this is the instructor. it is they that make you relaxed, confident, believe in your own ability when you are a natural worrier, all that stuff.