I trained at Netherthorpe with Phoenix (very cheap and highly recommended, BTW) who then had four C150s (now, as mentioned above, they use aerobats).
Netherthorpe has two runways: one is very short and the other
short, so we were taught 40 deg on final, which got us in with runway to spare. Sometimes caught out the 152 jockeys who were used to full flap being 30 deg, as it flies like a piano with 40 deg flap. On gusty/cross-wind days we often used 30 deg flap to land.
On go around 40 deg wasn't a problem (so long as you weren't too slow on final and flew the book figures) - carb heat off, full throttle, flaps raised to 30 and then 20, watching for sink and, if all was well to 10 and fully up after about 500 feet. This latter part was fairly instinctive to Netherthorpe pilots as the short field meant all takeoffs were with 20 deg flap, so we were used to dealing with flap retraction shortly after take off.
I think the change to aerobats came largely because of those fairly regular buttock clenching moments when on a hot day, with an uphill grass (sometimes wet and longish) runway two up, the hedge seemed uncomfortably close
an additional 20 hp (I think) in the aerobat really helps, although the cruise speed isn't much increased over the vanilla 150 and it uses a bit more fuel.
Flap monitor position varied. In most it was on the left door pillar, but one model had it on the panel, next to the flap switch. Switch varied too. On some it was a hold for down and watch the monitor (or the flaps when, as often happened the monitor didn't work) and a switch and hold up (for partial retraction) or leave up (for full retraction) and centre neutral. In others it had detents for 10, 20, 30 and full flap, which was much easier to use.
All in all a great little plane.
24R