Whenever they offered a sample search I would give it a try and never found anything. However, I recently discovered that my local library has a subscription and I can use it from home, so I tried again and this time I found an obit for my greatgrandfather that included a sentence that broke open a whoile new line of research, so it was certainly worth the effort.
It is oddly hit and miss because one time a search will give you something and the next time the same sear ch returnms nothing. It is much fuzzier to search than genealogybank.com, so if you have to pay, go for gb.