Chiltern Railways reliability?

[toursenlair]

Does anyone know how reliable/punctual the Chiltern Railways service between Marylebone Station and Oxford is (weekday daytime)?

Thanks.

[Lindsay]

I use that line occasionally at off-peak times and find it pretty good.  It's slower than the Paddington-Oxford route but those trains are notoriously unreliable.

[Pulcinella]

Chiltern Railways are generally very reliable. I use them a lot between Birmingham and London and only occasionally is there a problem. If there is tickets can usually be used on alternate operators, Virgin for Birmingham and Great Western for Oxford.