I found this company via Trip advisor, so I was fairly confident that they would be good, however I did have a slight worry beforehand as you can never be sure! Our luggage took ages to come out when we arrived, so I had missed calls and an email waiting for me when we eventually went in search of our taxi man! They were waiting with a sign, so we found them really easily. The driver was friendly and polite and drove us there in less than half the time the coach transfer was expected to take. I emailed two days before we were due to come home, and I got a prompt reply confirming our pick up time. The driver was there 10 mins early and, again, he was friendly, polite and drove carefully. Both cars had the right car seat for our toddler, and all luggage (pram etc) were included in the price. I would 100% recommend this company! The price was reasonable too!
http://www.taxipmi.com