I recently used the combo pack (this past summer). It has been a few months now since I used them. They worked fine for me. My husband was pleasantly surprised. The first thing that you have to understand is that ora-band is only for your front row of teeth. If you need to move your pre-molars and molars this is not for you.
-For my 2 front teeth: All I had to do was use the narrow closing bands for those. Change them in equal intervals of time about 3 times a day. They give you 2 different sizes of narrow closing bands (this is in addition to the wide closing bands - I'm not at that part yet). If you have a big gap then you want to go with the bigger narrow closing bands. But if your gap isn't that big then you can use the small narrow closing bands. My gap wasn't too big. It wasn't small, either. Mine was about mid-sized (probably venturing toward the larger side). I closed my 2 front teeth and got that out of the way. When my 2 front teeth closed I had little spaces on either side of them where my 2 front teeth used to be. Then I went on to the wide closing bands.
Once my 2 front teeth come together I made the switch from wearing narrow closing bands to using narrow retaining bands. The narrow retaining bands held my 2 front teeth in place. The gap stayed closed and my teeth didn't move anymore.
At that point, while I was wearing my narrow retaining bands I used my wide closing bands. You probably already know that the wide closing bands are for the teeth on the outside of your 2 front teeth. The lateral incisors are right beside your 2 front teeth and your canine teeth are on both ends of your front row of teeth.
I stretched one wide band from one lateral incisor to the other. It worked the same way that bringing my 2 front teeth in did. I put on a fresh band 3 times a day. Once my lateral incisors closed in my 4 front teeth were together. Then I switched to using wide retaining bands on my lateral incisors.
At this point I was wearing one narrow retaining band on my 2 front teeth and 1 wide retaining band around my lateral incisors.
I then had a little space between my lateral incisors and their respective canine teeth. I used 2 wide closing bands to bring those in. Then the entire front row of teeth had no gaps.
Don't forget to get a retainer when you're done. That way you don't have to go through the whole thing again. That was my problem. I had braces a long time ago and I didn't wear my retainer regularly and over the years I developed a gap.
I just want to add a couple of things:
a) the bands are not made from rubber. There is no odor. They are totally tasteless. They are also clear.
b) When I was young I had braces. My mouth was a science project. My canine teeth used to be parallel with my 2 front teeth. I had no angle in them. In one visit, my orthodontist went inside of my mouth with his hand and literally turned all of my canine teeth in 5 minutes. The braces did not do that. He did it. I went into my appointment with my canine teeth turned one way and came out with my canine teeth turned another way. I say that to point out that orthodontic treatment is fairly brutal (at least it was for me). But I had no problems from it. I actually found the bands to be much more of a gentle product than the metal braces that I wore that were cemented onto my teeth.
The process with the combo pack is just a graduating phase of bands. Move from the narrow closing bands to the narrow retaining bands. Move from the wide closing bands one one set of teeth to ther other. Move from using the wide closing bands to using the wide retaining bands. Then it's over. I hope that I'm not making it sound harder than it really is. It's pretty simple after the first couple of days.
My gap is gone. Now that I am older and wiser I don't ignore my retainer.
I hope I helped you. Take care!