The amount of force I applied to open the case using the suction cup manually ended up tearing out the home button cable...ripping it in the process. Goodbye TouchID...see you next generation T_T
I would definitely recommend buying a stupid iSclack. I don't know why they'd even present the suction cup as an option. Maybe the 5S opens more easily when it's new. Now I need to decide between dropping more money on a new home button (and iSclack this time) or just hold out with the software home button.