Database prefix.. Good or bad?

Hello.
I have worked with OpenCart for a few years now.
I have never used prefix for the database (like oc_). I know it can be good for hacking protection, but how good is this if i buy extension that need to insert tables to database.

Like say that i will install vQmod. This script require to make changes in db when i install it.
Will this go smooth or do i need to edit the files in every extension?

Thanks!

depends on the developer of extension, if developer has enough knowledge of opencart he will make use $DB_PREFIX variable (defined in config.php) while making db queries. in my experience most of the extensions i have seen uses this variable. even if they don't use it you have to edit just a little bit of code.

I think it is a must to use prefixes for database tables. Otherwise mysql keywords will be used as a table and can generate errors. I had one lately with one customer by using the Option table. With prefix it should be oc_option which is no problem.

You enclose reserved words with backticks.