Well I think the main reason is that it is a thread about car mounts for a Nokia 930 so other suggestions should be welcomed not shunned or scorned.
Anyone searching for Nokia 930 car mounts (like me) would find this page and for a minute I got excited because I had never heard of OSO. Sadly though, on further research, it is just another universal mount.
The Brodit system, however, which I have used for many years now and several different phones, is superior precisely because it is specifically made for an individual phone. The phone fits it perfectly. They also do three versions: Dumb mount, cig lighter active mount and fixed wired active mount. They also used to do one with a USB connection which could stream music although I don't believe they do a 930 version like that. Yes they are more expensive, but if you just want something that is stuck to your windscreen then there are literally hundreds to choose from and a quick trip to Halfords will sort you out.
I personally think windscreen mounts look dreadful though so I would never use one. I was looking for an alternative to the Brodit system. As you say, it is quite a lot more money but there is always a reason for that and it isn't always to rip you off. I fancied a change though having used them, for about 10 years but I can't find a decent alternative. You also have the choice of how you want to mount it. They normally have a couple of different mounting points for every car, or like me, you buy a fixed mount that glues or screws to a solid bit of car semi-permanently and then you can mount it where YOU want. You can then move it to your new car or buy the new phone bit for your new phone without having to replace the whole thing at once.
For the life of me I can't see how a company that makes a mount that presses buttons on a phone yet calls itself "universal" can survive.
Just my two pennies worth, but useful information is, erm, useful when you are Googling something you need.