I've used the EZtouch on a few projects, and over all I like them, and think they are a pretty good value. A couple of things I've picked up:
1) Do as much of the programming as you can first, and then import the tag base into the EZtouch. It save a lot of time.
2) I don't use the frames on any of the indicators - they make each item use up twice as much space on the touchscreen in order to be readable.
3) On trends, the X-axis is just the number of data samples. Use intervals of one minute or one second or whatever to get the X-axis labels at all useful.
4) Turn off scaling on the digital displays and entry fields unless you actually need to scale. Otherwise you forget to cahnge the scaling and end up with some peculiar results.
5) If you want to change a tag that is used on more than one page, you have to change each item to another tag, or delete each item, before you can edit the tag. A pain!