Reservations on buying a mini DisplayPort to VGA adapter I'm planning on buying a mini DisplayPort to VGA adapter to make use of my unused Samsung 20" monitor. I'm planning to use it so that I can extend my desktop in my MacBook Pro.

I have some reservations if it would work fine. I've heard others complaining that it doesn't work when they attach their VGA cords to the device. Do you think the cause of it is just their monitors or MacBooks not capable of supporting a the highest resolution?  The maximum resolution of my 13" MBP is 1280x800. I'm quite sure that my 20" monitor can handle this.


Am I right with my hunch?
What's the issue why other monitors tend to not work at all when attached to the device?
I have several aftermarket mini DisplayPort to VGA adapters (el-cheapo like Monoprice.com) to work perfectly with several Macs and various monitors and projectors.

Moreover, I am ever pleased and surprised at how well VGA works considering the old tech.

It should "just work" for a 20" VGA display. The Displays control panel will let you select resolutions up to the max supported by the display and extend the desktop from your MacBook. Performance should be excellent. 

I use a cheap mini DisplayPort adapter ($9) with 2008 and 2010 15" MacBook Pros and various VGA displays and projectors and it has always worked with no fuss, even over way-too-long VGA cables (50') connected to a high-def projector.

VGA is component video so signal integrity means a lot for image clarity. For a desktop 20" LCD display on a normal cable, it will appear fine.