They gave me a brand new ER5 with 0 miles on it, which was better than the 3 year old one that got smashed. No mention of running it in or changing the oil, etc. and I was slightly ashamed that at 2000 miles when it went back the original oil was still in there and I'd been thrashing it with little regard for the kwak run-in schedule that I already knew

Mind you, at £50 a day for 2 months they could get another new ER5, so what the heck.
It came with the irritating datatool 3 alarm and even more irritating indicator bleepers

not sure if all their bikes do, but you'll soon find out.
DO clean it and oil the chain and make it look nice before they take it back or you'll risk losing the 50 quid deposit. And don't drop it as you'll be liable for any damage (if they still have the same third party insurance they used to).
I always go for the personal injury bit - I'm on my third case now. You might feel alright at the time, just scuffs and scrapes, but stuff like that has a habit of coming back and knocking you years down the line - get the cash and enjoy it while you're young and not suffering from back pains.