How much room is there after an offer? after 6 years as a bank teller

It is the first offer in 7 months and I do not want to mess it up. I would rather hear the honest version than the polite one. The benefits are decent. Did it backfire?

Thanks for writing this out. I went through something close to it 7 months ago, and it settled down once I kept a simple log of every call and form.