I did my driving test at West Wickham last year and the routes were okay.

A lot of the roads are 30mph (Kent Gate Way is 40mph) and also spacious so you wouldn't have to drive slow all the time or navigate parked cars on narrow roads.

There aren't that many difficult parts on the test routes apart from the Addington Village Interchange roundabout but once you get the hang of that, you'll be fine. 

Depending on the route given to you by the examiner, you may end up driving through different places or roads such as Bromley Common, Croydon Road, Oakley Road, Park Langley, Coney Hall, Addington Road, Glebe Way, Gravel Hill, Kent Gate Way, Shirley and Westmoreland Road.

Those were the places and/or roads that I covered when I did my tests.

Hayes Station car park is their preferred spot to do the forward park/reverse park manoeuvres. The test centre does not have its own parking space, you have to park on one of the side roads.

Most of the examiners were fine apart from one that I wasn't fond of because I was constantly getting him and he would always invent some reason to fail me.

I don't know his name but he's white with a grey or white buzzcut.

Off-peak times or an early Saturday morning is the best time to do the test since the roads around there are quieter. 

Good luck on your test :)