I agree too, no document, no description for each type, less example, no graphical user interface (GUI)
I can see option lists in setting page but I dont know what it does (some type)
No example (I see only 1 example there)
I think this plugin is for developer or at least understand coding and can copy/paste or understand what these "hideKey , true, label, radio, mediaButton, filesize etc." stand-for and how to use them
I use this plugin because
1. many people use it (Downloads: 243,469)
2. there're suggest link from codex to here
3. this is very first custom field plugin
4. so I hope a developer will alway continue developing this plugin in a long term
But I will lost my patient that I have to pay my time for try understand some type, key in option list that I don't know where I can find the explanation
If there's a choice, I will use below plugin instead
http://wordpress.org/extend/plugins/advanced-custom-fields/
only one thing that i dont like advanced-custom-fields because they add one extra meta field
advanced-custom-fields plugin become popular now (Downloads: 88,211)
average download per day around 1,000 (and continue increasing) compare to this plugin around 500 (and continue decreasing) - you can check via stats tab
this stats tell which plugin people love to use
because advanced-custom-fields is super easy to use, easy to understand
you no need to learn or waste your time for just creating some custom field
finally advanced-custom-fields has GUI, no more coding, copy/paste