FF, I've only been with the company for a year and it was my first flying job after having a career change so I'll give you a view as life as an FO on the TP.
Generally, no qualms. The TP pay is a bit on the low side but can be made up to a more suitable figure by the amount of nightstops you choose to do, ie your dutypay goes up. Expect to add about £5K on to your salary.
The TP fleet (guys and gals) are great. Very friendly. For many of the FOs, it's their first job so the skippers are excellent in that respect.
As for bases, at the moment, MAN seems to be going through a low. I can't speak speak for the other bases but generally job security and being kept in the dark until the last moment seem to be the grumbles of late. Aren't all airlines the same?
If you're just interested in getting the hours and then moving onto something better then you can simply keep your head down until the time comes to jump. If, however, you'd like to stay and make it your career airline then expect to don a flak jacket. I doubt it'll be an easy ride.
PM me if you want to know anything else.
MB