I'm in the process of converting my foregin license to a Swiss one. I filled in the form, got an eye test done for 10 francs at the local Opticians and sent it in to the authorities. I registered just within the 12 month timeframe and am pretty comfortable I'll do well at the test.
Since my previous license is from a non-EU country that requires a driving test, I've received a letter back from them with an invite to a Kontrolfahrt - control driving test.
Thanks to lots of advice on this thread, I registered for a few driving lessons. At 90 francs per hour, it doesn't come cheap but in my point of view, well worth it. If you fail the kontrolfahrt, you'd have to do the entire Swiss license process from the beginning. And that is expensive, tedious, long and frustrating.
I had my first driving lesson this morning. I've been driving for almost 20 years and have even been involved in motorsports back home. Driving, I have no problem with but the rules here are quite different to what I'm used to. I would strongly suggest doing a couple of lessons with an instructor. I have another double lesson coming up on Tuesday 16th and once that is complete, we'll see how many more lessons I require.
I'm using a very good instructor, straightforward, honest and pleasant. Importantly, she speaks English! If anyone is looking for an English speaking instructor based around Uster, PM me and I'll send you her details. Uster is only an 11 minute train (S5 or S15) from Stadelhofen or 13 mins from HB and a pleasant place to take lessons, far less stressful than Zürich city or Winterthur.
Furthermore, she changed the location of my driving test to Hinwil as she says it's easier there and we'll be doing a mock test there with her. So if you're supposed to do your test in Zürich city or Winterthur, I'd suggest you change it.
Also, I'd like to clear something here: if you have an existing license that you are converting to a Swiss one,
you are allowed to drive an automatic durnig your driving test. It'll not restrict you from driving manual cars in the future and you'll receive a full license. It's only if you are a beginner and have no existing license, if you learn with an automatic, you are only permitted to drive an automatic.
I drove a manual today but will be using an automatic for my driving test, it's easier to focus on the rules. Apparently coasting in neutral is frowned upon. If I'm coming up to a corner or a stop, I normally always coast for the last 20 metres and she didn't like that. She says it shows a lack of control to the instructors. To me, it saves on gas, but not to her. Automatic it is then!
Send me a PM for further details. If you mention my name to her, I get a free lesson from her

! Since I'm unemployed, it'll help save on costs and I'd really appreciate it. And if you recommend her, so will you.
Have a great day people.