I've already posted ('can't phone station' in 'Across the west'), so apologies. Anyway...
I've been commuting between Reading and Bath for over 2 years now, although only 3 days per week. Choosing between car and train was a no-brainer really - with advance tickets and using the split-at-Didcot trick it currently costs me ^24.30 per journey. This works out at about 15p per mile at an average of over 70mph, and when you add this to the fact that I get about 2 hours' work done on the train, or alternatively can just nod off, it's no contest.
The service is pretty good.- the 125s are reasonably comfortable and quiet, and only get busy on the leg between Chippenham and Bath, although I've never had to stand.
Overall I'm a happy customer
Cheers
John