Pros
You could get away with murder because management didn't have a clue what they were doing. If you like a 4 day working week this is the place for you. Very little was ever achieved on a Friday. Good redundancy/compromise agreements - a lot of people only stay there because they are hoping to be made redundant.
Cons
Nobody picks up their phone or rarely reply to voicemails. Process were convoluted. A steady stream of redundancies on an annual/bi-annual basis (not a bad thing if you've been there a few years). Bullies within management. I have never worked for a company were the majority of people weren't willing to take ownership. Meetings about meetings with little to no outcome from either. Your attendees would be late because they were in the queue at one of the coffee shops. A market follower rather than a market leader and slow at doing that. Better packages paid by their competitors and forget a decent pay rise if you're promoted. You will soon be paid significantly less than your peers who have joined from outside Vodafone. Over priced canteen and the quality of the food is poor. The work/life balance is appalling. You are expected to be contactable even whilst on leave.