Kipping allows you to do higher volume at higher intensity makes it more of a metabolic as apposed to a anabolic workout, both ways are great and have their place depends on what you are after.
As with everything variety is good just watch your joints you do not want to drop at the bottom of your kip but swing down. Do a Google search for "eve teaches kipping" I think if you want more info it is quick and illustrates better if you see it.
Most people can do to around 2 kipping pull ups for every one regular. It can be hard on the joints so it may be better for beginners to do regular to develop the strength.
Strength before strength endurance
my 2 cents on kipping
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