Hi,
If you like to be treated in a miserable way, to pay a 50CHF initial fees for finding nothing and lose your time, go for it.
I was, like maybe many people in this forum, one who didn't want to hear the advice of the people against using matadienst. So due to my desperate situation to find quickly an appartment, I "joined" Matadienst... and
never ever again. This is really the last thing you want to do. And specially if you are not a "hard core swiss". Their behaviour with foreigners is more than borderline. Thinks like "spaniards ask too much. You only have to accept this and pay" was for sure the nicest "presents" that I got from them.
And of course, I got no appartment.
By the way, most appartment in Switzerland belong to a "Hausverwaltung=?property managment company?", so you normally speak first to the hirer. And believe it or not,
Hausverwaltung don't want to hear anything about matadienst (the have had many problems with them). Even the matadienst-broker told us we should better not mention them in our application!!!!
So after beeing fed up of beeing treated like a s*it and not getting results I used a more useful method(s)
http://www.alle-immobilien.ch/ http://www.ronorp.net/zuerich/inserate/alle-inserate http://www.homegate.ch/
By the way, I know personally 5 or 6 people that have used matadienst, none of them have gotten an appartment and all of them have the same opinion than me.
Good luck!