I have been using My Hermes for a while now, and have sent dozens of parcels using their service. If everything goes smoothly, which in my experience it often does, then great, however if you have to complain, then the service gets an awful lot worse very quickly.
In one instance I sent something that required a signature, and it was just dumped on the front lawn of the recipients' house. I complained, as I had not received the service for which I had paid. In the end it took three complaints, and the cessation of my business (not that it matters to them, but I was making a point) to get the refund I requested. I have also received goods (i.e. found by the door) for which I needed to sign.
As with much, I think it depends on your local delivery person at that time. Despite these two instances I still use them, and would always choose them over an alternative like Yodel/HDN, from whom I have received shocking service (without going in to too much detail, fraud and theft).