the products are pretty nice (if you get oneallan's is better by a far shot), but you really don't need to buy them. You can just fuck around and get nice handles, but if you want a structured setup its pretty simple. Try this for the next four weeks. i did it back in 9th grade (year and a half) and improved my handles quickly. I always go back to it when im feeling rusty.
do the same stationary ball handling workout 5-7 days. 3-5 days a week work on your moves.
stationary workout (go as fast as heavenly possible and by the end of the four weeks each drill should be easy as hell)
1. Ball Slaps: 25-50
2. Ball Squeezes: 25-50
3. finger tip taps: 10-20 times up and down
4. Ball wrap: 25 each hand each direction (head, waist, 2 legs, R/L leg, figure
5. pounds: 20 each (shoulder high, waist high, ankle high) try to make dents in floor
6. V dribble complex: 30 each combo (crossover, between legs, behind back, 1 hand front, 1 hand side)
7. dribble wraps: 20 each (in wrap, out wrap, figure 8, scissors)
8. taps complex: 10 each (figure 8, R/L leg, 2 leg)
9. freestyle: 3-4 sets of 10-60 sec
adjust the volume to how you feel that day. if you need extra work on left just add more reps on that side. if you get bored just do other variations of each like with ball wraps new direction, v dribbles make them wide/add a dribble/etc. just be creative
whenever else you feel like it just practice your moves and really focus on the little details.
do this for four weeks then you can just progress by doing harder variations of each for 4 more weeks