Hi Alonso
I haven't purchased my first bike as of yet (been putting money away each month to save for something). My dad purchased a Sym Crox 125 scooter 2nd hand about 2 years ago now and I have been using it as a run around for about a year now. I'm in a rather strange predicament regarding these cheaper bikes (by cheaper I mean significantly less than big name brands like Honda, Yamaha or Suzuki). This bike has mostly been a pleasure to ride, easy to work on and far cheaper than any car to maintain but I have started to find some issues with it. The first issue came in the form of a starter motor solenoid which was damaged (thankfully only cost around R300 to replace and a local Suzuki dealership ended up repairing it for me). Earlier today, I decide to go for a ride down to the beachfront. I get on as usual, turn the key, hit the ignition and it fires first time but then I can hear the starter motor failing to disengage from the engine. I immediately killed the engine, left it for a few minutes and then tried again only for it to do the same thing. I then removed the key from the ignition and to my dismay the bike began turning over (even with the key in my hand!). I got it to stop by disconnecting the whole battery (which is now flat as a result of turning the engine over for a good 5 minutes before I could grab a screwdriver to disconnect it). The bike will run absolutely fine if I kick start it.
As stupid as this story sounds, that has just been my experience with it. I don't blame it, I mean the whole scooter cost less than 8 grand so how can you really blame it for not lasting but you would think it would last at least 3k kilometres.
Long story short: I have always been a little reluctant to throw money at the big name brands like Honda or Yamaha but the responses I have gotten about big name bikes (from friends and colleagues) has been overwhelming positive. You can still buy a Sym Blaze XS200 bike for around 18k brand new with 2 year warranty but long term it will probably give issues (not that I have heard anything bad about them from a few friends that have bought them brand new).
If you have the money, go for a Honda, Yamaha or Suzuki. It's not that I don't like the Sym bikes, I just don't enjoy spending my weekends fixing menial issues on bikes that just don't happen with name brand bikes.
Hope this helps

Cheers