Qiyi Qicheng Skewb
The Qiyi Qicheng Skewb is a perfect beginner skewb. It has fast, smooth turning and doesn’t lock up, which will certainly help you set your new personal best.
Instead of magnets, this cube uses ball bearings which click into place once the turn has been completed, stopping you from overturning. These are cheaper than magnets and work in almost exactly the same way.