Jump Soles can cause shin splints. They're not as bad as ankle weights, which can really destroy your knees, but your still better off doing weighted calf raises. And a really underrated excercise, jumping rope. 15-20 minutes a day can produce huge results in terms of vertical, lateral quickness, and overall stamina.
There are many better ways to get quicker and jump higher without wasting money, or causing potential injuries with ankle weights. To get quicker, run bleachers or do uphill sprints. If you want to jump higher, and your body is mature enough, get a coach/trainer to teach you squats/deadlifts/clean and press etc, or possibly try a plyometrics program if you have a strong enough base of strength.