As I understand it you can't fit a centre seat due to the legalities that a late model like yours must adhere to. That said you can't fit a child seat on a centre seat anyway.
Mine is a daily driver and it's a hardtop - no rear seats. My wife sits in the middle and a child seat in the passenger seat. I need to look at fitting a forward facing rear seat in the back if we are going to start driving into Europe though....
I guess your answer is all down to what your wife actually makes of it .... ?
Negatives are:
Noisy, quite a bit of maintenance, poor economy, back seats are impractical, usually let water in etc etc
Positives are:
I love it.
Don't know if that's much help ?