Years ago, I tried the OTC trays, whitestrips and brush on whiteners and wasn't too impressed. When I had my braces removed, I splurged on the Zoom 1 hr whitening and while the results were good, the process was uncomfortable and my teeth got really hot. I wouldn't recommend it. I also got custom made molds and gel so I can maintain the whiteness myself. I do a touch up syringe every six months after my dentist cleaning.
Those GoSmile, daily touch ups sound great. I want to enjoy my red wine and coffee before the wedding, so I'll be trying those.
Hint -My dentist told me to wait 24-48 hrs after whitening before having any staining beverages like red wine or coffee, so they don't have a chance to set in.