washes

Recently ive become lazy in the car wahsing department and instead have been pulling into the local hand car wash places you seem to see dotted all over the place these days! The one i go to charges £5 for a full clean, wax (wet spray on wax thing), dry with chamis, window shine, door sills...

Just wondered what everyone's view is on MOT washes.... Would I be able to get under the car/wheels done myself with a normal or power hose without jacking it up? I have heard some places do 'MOT washes' which include hosing your engine... this does not sound like a good idea to me...