Like others, I went to Port Union for both my G1 and G2 exit tests and passed both times on the first try. Port Union is great because the check-in and check-out process is quick and efficient. I think when you are feeling antsy/excited for a drive test you really don't want to wait too long in lines, the process was very smooth and I actually started earlier then my appointment because they were so prepared. I made my appointment for a Tuesday at 10:15 AM because it was a great time to avoid heavy traffic while having the test done nice and early in the morning.
Both my examiners were nice and introduced themselves and they certainly made me feel comfortable. For my G2 exit (I did this yesterday) I had backed into the spot, so I signalled right and drove out of the parking lot. Try your best to park your vehicle in one of the first spots, they are the most manageable and flat spaces in that lot. I connected onto Kingston Road and drove down to Altona, then turned left at the second light. In this residential area, I did a roadside stop and a three-point-turn. After leaving this area I went back onto Altona to Kingston Road, then headed Westbound on the 401 to Morningside, got off and then headed back Eastbound to Port Union. I did lane changes on the road and on the 401 and just made sure to over pronounce my mirror/blind spot checks as well as keeping a clear eye on my speed. I then went back to that (awful) back lot of the Drive Test Centre and did a reverse park and a forward park. I must be honest and say that my parks did not go very well, I kind of got in my head and took way longer then I should have doing them. I find that back lot was the most intimidating part of the test as many spots are narrow, on angles, or have a small amount of space to align your wheels so you can pull-in straight. My advice would be to think it through and don't get pessimistic like I did before I began the parks.
My examiner was a female with dark-skin and probably in her mid-thirties. She was very clear with her directions and was nice to drive with. As much as my parks we're not very good I still passed and I think this was largely because I checked my mirrors/blind spot and speed very obviously and frequently. I would also make sure to merge onto the 401 at 98-100, they definitely check to make sure you're merging at a safe speed and maintaining that speed.
I highly recommend Port Union, I find the area is easy to navigate and the Examiners are clear and approachable. Good luck to anyone going for a test!