I landed at Toowoomba in 25 knots of crosswind on my PPL test. It was a bad landing, I was off center and I really thumped it down. It was one of my worst landing since going solo. I thought I had failed the test at that point, in hindsight I should have done a go-around. In fact, I should have opted out of the test that day because I knew what the wind would end up doing given the fact I am a sailor, but the forecast was marginally good so I opted to go for it. Had 3 or 4 failed attempts at the PPL test due to weather so I was mad keen to get it done.
Coming into Redcliffe, there was near on 25 knots of crosswind too. As the ATO said to me, you fly out of Redcliffe, get over it. My landing at YRED was much better.
15 knots crosswind is not uncommon at Redcliffe, so you get used to it. I am happy with 20 knots, but over that I am uncomfortable. When I flew out of San Carlos in the US we had 30G35 crosswind, I would not do that on my own, its not fun at all, but the instructor there was used to it and for me it was a good (yet very scary) experience. I learned a lot from flying in the US.