Lovely clean boxes in good condition, they only ask you to take out poo and bedding as they wash the boxes down themselves.
Great service, really lovely chap and very patient showing all the box controls etc and very flexible over timings (late returns by arrangement though there is a fee payable) we dropped one back at nearly 10pm once!
I got caught out by not reading the T&Cs though and was charged excess mileage because our journey was long
Their deposit is also very large, I guess understandably but its a lot of money to find if you don't have a credit card
I havent heard of SQ before, perhaps I have used them under a different name..
I did have a great little 3.5t hire from a stables in Great Brickhill, super little lorry, not as immaculate inside as Bicesters but the price and service were great and it was closer to home which was a benefit, smaller deposit needed but not as flexible on timings as Bicester though. I cant remember the name of the place but could tell you where it is if you are interested