My wife had a 230 and was not very confident. She was brand new and very fearful. We ended up selling it and I'm actually going to buy a TTR125LE today, which is comparable in size to the CRF150 but lighter and with an e-start.
She's rode my nephews ttr125, her friends crf100, and my sister in laws 230. She is dead set on the 230. The ttr and crf100 did not feel as comfortable to her and were kinda small for her.