We used Guardian Moving and Storage a few years back for a big move and it turned out to be a very bad experience. I don't know if they were just going through a rough spot or if that was typical for them. I would advise anyone considering them to get everything in writing down to the last detail. We had a strict deadline to be out of our house and they were late starting on all three days of the job, plus some of their key crew didn't even show up due to some emergency that the office hadn't even heard about. They neglected to pack contents of kitchen drawers and at the end they just dumped stuff into boxes without protective wrapping or padding. We ended up filing a claim against them and got $800 back towards damaged and missing goods.
That was a few years ago, though, so maybe they have improved. I would proceed with caution if you are considering them.