I've an awkward one to quote for tomorrow. She's had at least three other local window cleaners before me and I've heard one of them (Ian Giles) moan about her, so I'm going to charge high, charge an initial cleaning fee, and be ultra ultra clear and direct with regards frequency. I'm guessing she's running out of local window cleaners to mess about, so hopefully will be more 'positive' with me.
It's a big place, they've tennis courts 'n' stuff, but the customer is absolutely drop dead gorgeous too; she's a fitness instructor, tall, curves in the right places, long blonde hair; really fit.
Wor Lass thinks we shouldn't quote for the job though. 
I reckon she's used to "dazzling 'em" to get her way. Your lass is right. I'd let her do the negotiations! (Tho' you might sneak a quick pic to see whether forum members agree with your assessment of the owner - all in the interest of objectivity, of course!)
Well, I quoted a good price and she told me that it's far more than what she'd paid before, but accepted after asking if we'd do a couple of inside windows (hard to get at ones). I agreed.
We turned up to clean, she was dressed in her work clothes - tight fitting exercise kit - and she looked stunning. She's about six foot tall, slender, and just lovely (she's in her 40s).
We had a chat about fitness stuff (she knows Wor Lass from seeing her running everywhere) and we got to work.
She bank transferred the payment to me the same day and text me a nice 'thank you and it was nice meeting you both' to me as well.
All in all I think she's a lovely customer and I'm not sure why other window cleaners found her to be not a good customer.
Wor Lass has her reservations, though I suspect it could be a bit of 'cattery' going on here.