Has anyone tried the Perfect Pushup? I bought one yesterday but it's $20 when I thought it was only going to be $10, and I hate wasting money. It's more comfortable than a regular push up, I can feel the difference in difficulty, and there are more options but I'm wondering if it's worth it when I can do a regular push up for free? Also I don't want to get bored of it and have it collecting dust in 2 weeks.