They have been performing great (the old ones, and assumedly these will the same) with my strobe project, and they also have been working great as PWM to 5 meter RGB strip light, 2A per color at 12v. They stay pretty much ambient, I use a high value resistor gate to drain for discharge, and around 100 ohms on the gate to a logic pin. I have used them with no gate resistor before, but been told it unduly loads the pin momentarily.
Considering that I had been intimidated by the scary symbol and only switched (ugh) to MOSFET for switching apps from darlingtons like TIP120 quite recently, the heat problems are much smaller with these!
I am about to take a foray into trying a MOSFET current regulator over a LM317 configuration, doing a bit of reading on current sources in general and better ways to drive the power LED's I love so much 
If I torch a few transistors learning something new, it's a cheap lesson...
Gonna keep the vendor as one to check their inventory once in a while, cheap, good sources are always a great find..