After using ZFX here are my thoughts on whether you might want to try it. Basically, as you probably already know from the discussions, ZFX allows up to 3 coats of Z2 and/or Z5 per day to be applied with ZERO cure time. ZFX also dries about 30 minutes, or so, faster than normal Z2/Z5. So, it really depends on how you're using Zaino now if you really think it's needed. I suppose my answer could be made easier by asking a couple questions for you to think about. Do you have the time, resources, etc to apply more than one coat at any given time? In other words, do you think you would actually apply more than one coat at a time? If you've got plenty of time and energy, go for it! Some people only have time for 1 coat anyway, so ZFX would be wasteful. Also, is the Zaino drying time a problem for you now? I know it can be tedious sometimes letting regular Z2 or Z5 dry for an hour or more, especially if you have to leave your car outside when detailing. If you really NEED for Z2/Z5 to dry quicker, then yes ZFX is a must. I personally think ZFX adds more durability and greater shine for me since I've used it. I know the enhanced Z2 has greater shine in itself, maybe ZFX added a little bit as well. But, since I've got plenty of free time (to apply multiple coats per session) and quicker drying is a plus, I'd buy ZFX again. If 1 coat of Z2/Z5 is good, then the benefits of 3 at a time is outstanding. If you don't need multiple coats or don't mind waiting for regular Z2/Z5 to dry then you may hold off for a while.
My .02
:xyxthumbs