I tried writing a sentence (我想去買東西) with iOS pinyin keyboard traditional and while I had some luck with the first two letters, it breaks on "wxq" to work again

I tried writing a sentence (我想去買東西) with iOS pinyin keyboard traditional and while I had some luck with the first two letters, it breaks on "wxq" to work again with "wxqm" and then break again. So it's definitely not as good as you market it. However it could be explained by the fact predictive typing on iOS is quite poor. Often a wrong letter in a word need to be corrected and the next predicted word (and it's conjugation; I'm speaking of French and English input) is often wrong. It may not be noticeable for someone who never used another keyboard, but as a former Windows Phone user the difference is very easy to see. The WP prediction was mind blowing and I could indeed write long sentences in French just by typing a few letter and using one of the prediction candidates.