I've been to a medium twice, but as it stands, I don't believe mediums communicate with the dead. I think they are just extraordinarily empathic people who can pick up on vibes.
You die, your electrical spark goes out, your brain is capable of such beautiful trickery, we all know it's like falling asleep and not waking up, there won't even be dreams. But mediums can convince you differently.
Considering humans are all electrical transceivers when you think about it (don't worry I'm not going all David Icke here) it could be rational to think we emit certain wavelength vibrations that are more easily accessed by mediums if their own chemical makeup is more sensitive to them.
My first time was to a medium as a child who said I would have problems with my legs when older. At that time, I was a six foot beanpole child with ridiculously long legs that were a distinctive physical feature, so she could have singled out something obvious.
Ive always remembered this and it occasionally freaked me out during my adult life as I was active and hiking/walking is my single greatest pleasure, so in that respect I was too young to be taken really to a medium.
I do have a problem with a leg, but not insurmountable, and I don't credit the reading because of this development.
The second time was at a spiritualist church my Mum took me to with a visiting clairvoyant.
There were about 100 of all ages there, adults and some older children. I was about 17 or 18 I think.
I'm poker faced by nature and don't give anything anyway.
But the medium picked me out and said, "I only have one thing to say to you: He said: Yes, of course he loves you".
My (step) Dad had died and I'd been concerned that I didn't know if he loved me or not.
Of course, that response is easily generalised and can apply to everyone in that room, but it meant something to me.
Also, my Mum was grief stricken and it would have showed on her face. She was there for answers. It's probably easy to recognise bereavement grief and someone can assume a middle aged Mum with her teenage daughter may well have just been widowed.
Ultimately, I think if you have a strong desire to see a medium or any kind of psychically interpretative service such as tarot cards, astrological chart, etc them you are looking for an answer somewhere, so one source is as good as another as long as it gives you what you need. I do believe we all have the answers we need already, but just need help seeing the wood for the trees.
There's better ways to waste some money, but if you're sold on it already, you'll pay yer dollah and take what you can from it anyway. What doesn't make sense you'll ignore, what makes sense you'll absorb.
I hope you find the answers you are looking for 