Pro's
- Improved handling
- Extra 2 years worth of warranty which you didn't previously have.
- Much better ride over standard, much more responsive.
- LOWS!

Cons
- Have it too low and it can compromise handling.
- Have it too low and it will scrub.
- Some shocks leak fluid, but usually fixed under warranty.


Just dooo it!!
 
Con: Uncomfortable as hell at the lowest settings. But as said, man up and itll be fine.
 
Coilovers all the way, it's the only choice for getting the car sitting exactly how you want.

Give me a shout if you need any help or prices.

Damian @ DPM Performance
 
On the wheels you have looking at your pic - 16" Sport alloys with 45 profile tyres? Coilovers are mint. Harder than standard but much less crashy, if your budget will allow go for AP's upwards :)
 
Part of my tooth fell out not long after I had coilovers lol coincidence some say....
 
Based on a normal coilver, where just height adjustable

Pro's
* Can go lower
* Can get better handling
* Smaller damper/spring radius means wider wheels (inside)

Con's
* As height determines damper travel, can get rubbish handling if very low
* Hard to set up properly to equal heights
* Rear camber will go out loads when alot lower (so you need camber plates/shims)

As long as you are not stupidly low, they can be advantageous, unless stupidly low is what you want (which I did, so didn't care too much for handling, but didn't want dangerous).