I have a supernote. I'm glad I have it, it fills a niche for me that has been very beneficial. With that said, I don't think because it works for me that it will be a good tool for everyone. I'll make a bit of a blunt argument, but I hope you take it in good spirit.
If you buy some shiny new toy that you know you don't need then you are a slave to your desires, a slave to marketers. You're taking hard earned money that could be saved, invested, or donated and using it to engage in a useless fantasy of some sort of benefit that you already know to be marginal. Do you want to be the kind of person who does that? Do you want to be someone who mindlessly consumes products just for the sake of consuming products? Tools are a means to an end, don't make them an end in and of themselves.
Also, you already have a workflow. What are the costs of switching from what you know works? Think also of possible unforeseeable downsides. You know the limitations of what you have currently, but you also know /exactly/ what you have. Do you choose the unknown item that will only possibly have marginal benefit or do you stick with what is tried and true, known, and established? Id choose the established option any day of the week.