My brother has the Qifa S, and it is okay, but I would go for the YLM (idk though because I don't have it).
Also, I'm looking for a cheap magnetic 2x2 and 3x3 just to bring around with me. For 2x2 I was thinking the Yupo v2 M. For 3x3 I was thinking the Yulong v2 M, the Kylin v2 M, the Thunderclap v3 M, or the MF3RS3 M. What should I do for 3x3 and any other suggestions for 2x2?