I have many glitch/buffer/delay/filter tools in my arsenal but SE easily can replace all of them. I'd have to say this is essential in your arsenal if you're doing dance music. I've played with SE for 3 days now and it's not crashed once. The presets are varied and can be applied to anything - your beats, synths, or vocals. It's very easy to understand and well layed out. In fact I haven't even cracked the manual.
One nice thing about SE, unlike other plugins of its kind, is the volume of the effects don't get out of hand so there's a minimum of hassle when placing it on a track.
It can do simple delays to complex mess this thing up effects and is a HUGE time saver for making drum breaks and breakdowns.
There's even a Generator, a kind of simple synth inside that make beats into keyboard like sounds and wonderful whoosh effects.
It's also very friendly CPU wise also. I have 3 on a track right now.
All in all, if you know where to buy it, you can get a good price and it's a great value for the way it sounds, and everything it can do.