What would be considered "good Spanish" pronunciation?

How do you know if the Spanish you are learning is considered good Spanish, or if it is a regional dialect that might be considered inferior?

I would think that the Spanish learned here in Rocket Spanish is "good Spanish", but still carries some regional dialects (although many times it is pointed out when a word is said differently elsewhere). As to regional dialect, who is to say which dialect is "inferior"? There are 21 Spanish speaking countries in the world (as far as I know), and I doubt that any would consider themselves inferior. There are many folks here who have traveled extensively throughout Spain and Latin America, and I haven't heard any complaints. Although I have not traveled extensively as some, I have not had a problem with understanding, or being understood by, people from Mexico, Ecuador, Guatemala, Dominican Republic and others with whom I have spoken.

I agree with JC. Many years ago when I was in the Navy and knew very little Spanish I visited Spain & Puerto Rico a few times and along with a phrase book I tried to speak my limited Spanish. I lisped my "c" when I was in Barcelona, which is not done in Puerto Rico. Potatoes are " patatas" in Spain and papas elsewhere. As JC said there are many regional differences but I think one would be understood or folks would just ask ¿Como? And then, there would be an opportunity to learn a different word or another way to say something. Saludos, Rich

There are a lot of differences here in Uruguay in both pronunciation and vocabulary but the people here understand native speakers from other Spanish countries the same way someone from the US can understand someone from Britain or India. I try to use the way they speak here when I can but even people from Cuba, Chile etc say they really have to listen to understand the Spanish here.