I've always heard that bots have trouble with no limit. I'm pretty sure that I've identified a few but didn't report them. The bots may have been not of the highest quality, but they would fold just about anything with a >3.5 X BB raise, and never raised more than a min raise.....easy to capitalize on.
it will give you several opportunities to type correctly. Sometimes the code is jumbled together and hard to make out certain characters, also the characters are NOT case sensitive.