The ofna arbor is pretty bad after a little while. The Hudy one which clamps tight around the entire shaft instead of the set screw like the ofna is also a better design.
The Corally is a decent car. The parts support is not that great in the US. Also IMO its pretty out to lunch on carpet in comparison to the rest of the t-plate and links cars. I think it would be a little bit of a learning curve but, if you race on carpet you will most likely go faster.