You do, but that's easily sorted. Get your salary paid into a different bank (Nationwide in my case) and set up standing orders to be paid each month in to each 123 account. Split the usual direct debits such as council tax, gas and electricity, house insurance, car insurance, water rates, credit card bills, telephone, mobile phone, broadband etc and it's sorted
You've got to be very much on the ball to be able to keep on top of that lot, though - I'd rather keep it easy.... and I guess so much depends on how much you are saving overall, £20K souns a great deal to some people to have saved up.
You have to pay the right direct debits with the 123 account as you get cash back on some, which more than pays the £2 a month fee for me.
I know what you mean about being on the ball, boxtops. I usually change my energy provider and insurance providers every year. I forgot the breakdown cover, too. If I didn't keep careful records I'd have no idea who I was with :D