Ideal extension for MacBook Pro

I have this memory expansion for my new MacBook Pro (15 "mid 2010) brought to double the already installed 4GB. So I have more space for Parallels are available, resulting in a reduction of disk removals.
This product really the price / performance ratio. The original module costs many times over in the online shop and also originate only from a reputable supplier. So no domestic production of Apple.
The installation is really easy and is also described in the operating instructions carefully MBP. This should be read or observed necessarily, since some of the screws of the back cover being screwed in a different angle.

For compatibility, I can only say one thing: going well. No losses in relation to the original modules.

PS: The modules fit into a MBP (mid 2009).