ixf cheap Chinese cranks .Are they worth it?

For someone that doesn't exactly take it easy on the trails can I fit and get away with riding like I do with £45.00 cranks. I must say this experiment makes me nervous. there are numerous thing that could go wrong . I tried to find information out about these cranks , but I couldn't find and videos that gave me the information that I wanted . I just hope I live to regret my decision and it doesn't end in tears. wish me luck