So i could get PNY 480gb Optima ssd for 180 euros.
Should i buy it? Is it worth?
It should work just fine although keep in mind that it is an entry level drive so it will not have the best performance ever but it should be significantly faster than an HDD. I would say before buying that drive, see if you can find a Crucial MX100 in your country, the 512GB version of the MX100 is only a little bit more expensive (at least in the states) but it has better performance and is 32GB larger than the PNY drive.