I have one also and wouldn't be without it, throw light hit the button and on the money every time.
I would also like to add though that the gentleman "and there is no other word for him" is an absolute gem, I got mine second hand and after 6mths the belt broke so I called to buy a new one, I explained that I had got it second hand and was over the moon with it but the belt had gone, no problem I'll bob one in the post foc !!!
While I've got you on the phone I asked would you please tune my beam scale as it's struggling to leave its rest unless I tap the table. He told me straight away how to solve the problem and my scale works a dream now.
Bit of a long winded post but really can't recommend these enough
Jimmy