I have had parcels delivered from a pleathora of delivery and couriers service, some were good, others utterly despicable to the point they LIE!!
I go through a list and my exprience, first of all where i am, I live in North East London, Leyton area.
Royal Mail: Fairly Good, reasonable prices, i have used them both to deliver and receive (obviously), nearest post office is a 5 minute drive as is the nearest sorting office.
Parcel Force: Good and decent delivery, can track parcels, a bit pricy though when it comes to import and customs as they slap a £13 admin fee on top of VAT and import fees and wont release your parcel till you pay for it
DPD: Best courier in my area, gives email and text updates telling you when delivery is likely to be for that day and often its on point, tracking service not as good as it used to be, now it just gives you the time and drivers name, before it used to give drivers name, where he was and more importantly where in the queue your parcel was as in "your parcel is 34 out of 60, your driver Javier is on delivery 15".
UK Mail: Ok enough but mine is quick to leave the door and get back on the road, you have to stand watch like sentry duty waiting for him to come.
UPS: Good delivery service, very good on things being imported and does not slap on admin fees (if they did it was so small i didnt even notice it), often to expedite your delivery they will pay import and VAT fees and delivery it to your door before sending an invoice to pay for it that you get your parcel as fast as possible.
Hermes or as i call them Herpes because they are like a disease: Terrible courier service, you will get the parcel when the driver feels like it, on more than one occasion the driver has lied about deliveries, I once purchased a TM FN 5-7 GBB, sent by Hermes (when i saw this i dispaired) they were late to pick up the parcel from the sender and after 2 days the tracking said it had been given to me when it had not, i was in all day for it, 2 days later (a total of 4) I get a random knock on the door around 8pm and then gun is finally delivered. LYING F**KS!!!!! Oh and they employ anyone who has a car, doubt they check licence and insurance for business use, probably why they are late all the time as police are always seizing their cars from no insurance.
Nowadays when i buy stuff on the interent or forums i try and tell senders to avoid using HERMES.