Complex sentence: CNET's Bonnie Cha found improvements such as the better user interface, universal search and the much improved browser and multimedia experience, while she also found the smartphone can be sluggish and it could stand for some hardware upgrades.
Split into simpler sentences: CNET's Bonnie Cha found improvements such as the better user interface, universal search and the much improved browser and multimedia experience. On the other hand, she also found that the smartphone can be sluggish, and could stand for some hardware upgrades.