Oil and filter changes are pretty straightforward on these. Brakes and some other routine maintenance don't look too bad either as they are similar to other cars. Depending on your warranty, you would want to document and save receipts.
The + 100 HP is partially true, but misleading ; that's based on dyno results in a controlled environment , in real driving conditions that bow's air friction / drag disrupts the aerodynamics and the HP increase effect is entirely negated. Not to mention the added weight to the car ?