My experience was like what squirrellypoo described - all the time spent (wasted away?) before actually getting to take the test. (A Polish guy taking it at the same time as me heaved a big sigh and said something out loud like, 'For god's sake, how long is this going to take?!' Lol!) Then I had to wait around afterwards until everyone finished it before getting my results. So yeah, it was about 2 hours.
(Taking the test itself was less than 5 minutes!)
Plus, mine was in a horrible little grotty industrial estate - the forklift driving test was next door!
(I wondered long afterward what might happen if any people whose first language wasn't English might have wandered in there instead, thinking it was a very strange 'Life in the UK' test to be taking.) The people administering the test had trouble speaking English.
And lastly, I had trouble getting transportation back into the city afterwards - different bus company & no small change on me. (Getting there, DH had dropped me off on his way to work.) So I had to wait in an awful neighbourhood while I rang for a cab. So glad it's over!