I wish they would stop calling them GFCI, because they are not.

They do not measure a ground fault, the measure a difference between the inflow and the outflow. This does detect most cases where you would have a ground fault, such as a puddle of water in the bathroom.

However, GFCI plugs are very bad for things that actually use electricity or spike electricity.

Such as, the above mentioned, power tools. The bigger the motor, the more likely it will blow the GFCI just by being turned on. Imagine cutting through a big timber and hitting a knot. Suddenly your big saw stops because the amperage suddenly spiked. Well, now you have a very dangerous situation.

The other thing is heaters. Which include light bulbs. These things actually use up electricity so that the flow in and flow out are not balanced, and will blow the GFCI.