Just casually reading r/fidelity on Reddit (which is a subreddit run by Fidelity) would make me run fast and far from using their cash management account for anything. Widespread check fraud has caused Fidelity to be extremely cautious -- read slow -- in giving people access to checks they deposit into their CMAs. I'm not saying this is a bad thing, at least Fidelity is being cautious about taking care of their customers' money, but it's created a good deal of pain and anger for people who are depending on Fidelity for everyday banking-style transactions. I'll invest with Fidelity, but I prefer to keep my everyday money in a traditional bank or credit union.