There are different disciplines of Pentacostals. The name, of course, comes from the NT event where the gathered disciples were visited by the Holy Spirit, which appeared as a tongue of fire over each ones head. This caused them to be able to speak in various languages they had never known before. This in turn enabled them to go and preach to foriegners.
Today, members are very much into emotional displays of "possesion" by the HS at their services and a conservative lifestyle. At some point you will be encouraged to come before the congregation in an emotional state of ecstasy and declare your being "born again" in the HS.
You asked for views? Here's mine - Gag me with a spoon.