What are Your Opinions on David Warner's Unbound Doctor?

Been getting into the audio dramas recently and found it pretty interesting to find out that not only are there audio only companions but an audio exclusive doctor. Missed out on the Unbound sale last year though and don't have to enough for the Lucie Miller box sets. Wanting for them to go on sale again.
To the people who've listened through to some or all of his stories what are your thoughts on him? Where would you rank him compared to the official doctors?