This logo looks very professional due to the quality of the graphics. The lion in the center represents strength and power. The colour scheme is mostly gold and red which are bright and attractive and also gold combined with the lion is a royal allusion, which shows that MGM considers itself as one of the foremost film companies.
The saying "Ars Gratia Artis" means "Art for Arts sake".
This logo does inspire confidence that the film it is representing will be good.