Any question answered...

@greenhell is forrin?

Stay clear of the cheep hire car places at the airport, they tend to rip you off for mystery scratches. Stick to Avis, Hertz etc. I probably wouldn't bother with a hire car when you are in Cape Town, use uber. For short journeys it's one or two pounds, was there a month ago working in a township 35km away and it was under £10 to get out there.

I'd recommend lions head in the morning too. Would recommend hiking table mtn (via kirstenbosch gardens or india vester), Devils peak (if you like the first two), Also silver mine/constantia nek is good

Surfing at muzenburg, Fish and chips and the bakery in Kalk bay round that way are good too.

Bikes we rented from here http://www.capetowncyclehire.co.za/

We did the Chapmans peak drive, boulders beach (penguins) and cape point on rented vespas. Wind and rain got up and it was pretty risky but if its sunny and not windy would be good.

Everywhere seemed to sell burgers and the best of them were, Hudsons, Royal Eatery and The dogs bollocks (which does good breakfast, lunch and coffee and is a bit different)
Addis in Cape Town was a decent Ethiopian restaurant
Takumi was good (to a western palette) sushi, reasonably priced too.
Truth coffee was best coffee
Nandos!

Loads of bars on Long Street (Which is pretty tacky but a laugh), Bree street and Loop street as well (First Thursday of every month all the galleries open late and the bars around here are very busy)

Woodstock is nice, biscuit mill is worth a visit for a borough market feel at about 1/3 of the price.

I would agree with the avoid things. People ask for money a lot. I also felt like the train station was a bit dangerous. Don't walk alone, if in doubt get an uber!

If you have a spare 5 days I would recommend driving up to the Orange River for a canoeing trip. Which was amazing, sleeping under the stars, canoeing through a mars like landscape. Recommend Amanzi River Trails if you fancy that.

Cederberg is also amazing if you want to get out in the wild. We stayed in Krakadouw cottages near Clan William which were rustic but beautiful.

I think thats it....

Hire cars - are there anythings you'd suggest to go for/avoid?

Buy yourself year long worldwide excess insurance - £40ish will cover your excess (which could be in the high hundreds) for any car you drive. Meaning you don't have to worry about being dicked over for scratches & bumps.