I had only used the Ultima brand before I switched to LMNT, and I definitely prefer LMNT. Ultima never really fully dissolved and tasted like crystal light to me. LMNT is pretty dang salty unless you do the max water amount (or even more) but I feel like it’s a much better option for IF (and in my case keto). The citrus and lime flavors are my favorite. Stay the heck away from watermelon. I have a whole box that I don’t know what I’m going to do with. So gross. I did end up buying the subscription option from them, but if you look around I’m sure you can find the free trial set that I got initially so you can find what flavors you like.