A bit overrated in my opinion.
Most of what you taste is the butter and parsley sauce, which is usually delicious. In the south they use tomatoes, thyme and bacon. Some Mediterranean dishes only require olive oil as sauce and minimal preparation, so they taste like fucking dirt.
Some people here eat their garden snails after having let them fast for a fortnight so that they expel the contents of their digestive system.
I've never done it myself because I don't know my snails and don't want to get sick, llowhich reminds me of that Australian kid who died recently who had swallowed a slug and got rat lungworm.