Wow, return of the 3-yr old thread.
Combat planes in general are usually pretty stable, and not the fastest things in the world. Set up correctly, they can turn amazingly tightly, and the durability means you can goof around doing knee-high passes, fly around behind trees, and other things you wouldn't risk an easily damaged plane doing.
But they are the most fun when flown against other planes, which is the point after all.
The Slasher is the .25 size version, right? The .25LA really isn't a very powerful motor, you'll want something like a .25FX and a mousse can would help. If you aren't going to fly in competition, an .32 can be a lot of fun, though you have to make sure you don't over-stress things.