I have both and I like the neilmed better. It's easier to use.I have used a NeilMed Sinus wash for many years. It actually has reduced my sinus infections big time. I used to get 3 or 4 infections every year. Now I get 1 every four years! Well worth it. It is also great for treating a cold.
I recommend it instead of the Neti pot. It is much easier to use, you won't run the risk of drowning (LOL) and you can get more pressure out of it if you want!
You can also get a child size bottle.