Complex sentence: The obvious advantage of pinyin-based input methods is the ease of learning for Mandarin speaker; those who are familiar with pinyin would be able to input Chinese characters with almost no training, compared to other input methods.
Split into simpler sentences: The obvious advantage of pinyin-based input methods is the ease of learning for Mandarin speakers. Those who are familiar with pinyin would be able to input Chinese characters with almost no training, compared to other input methods.