The fact remains that they will tell you that the Bible alone is their guide.
Saying “the Bible is my guide” and saying “the Bible properly understood is my guide” are entirely different things.
The Pentecostals have long been known to be hermeneutically-challenged by taking a passage that is exclusively addressed to the Apostles, and limited to a period of time before the sign-gifts eventually faded.
If you don't understand that, your interpretation will be all over the map.
Roy Zuck wrote the best work (and is college text) on this subject, "Basic Bible Interpretation."
“The fact remains that they will tell you that the Bible alone is their guide.”
I agree. Of course they will. These tradition is equal to Scripture groups always do.