I was worried about bike carrying ability of the Almera when I bought it. I do alot of biking, so transport them about alot.
The best way of carrying them about is a towbar, which will fit on ok to a non body kit GTI with a small bumper cut.
Next best is roof racks.
Rear carriers are ok, and its what I use. But they are not ideal. The weight is put through a tiny area on the bumper and over the spoiler. I've ended up removing the rear seats and carrying them inside, unless the car is fully loaded.
I use a Saris bones rack, and its one of the best rear carrier you can get. But far from ideal on a Mera. I may sell it soon, as the missus has a car with a towbar now.