Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
The original 2GB were most of the time not enough on my MacBook Pro mid-2009, so I struggled to find a compatible upgrade (1066 or 1333 MHz) and finally found this model from a local reseller in Morocco (http://uno.ma). I went with a 2x2GB and while the MBP memory upgrade is very noticeable when running several applications, it seems switching the MBP on takes longer... But it shouldn't be a big deal since (I guess) MBP owners rarely switch them off.

I tried also the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Samsung-2GB-DDR3-Memory-SO-DIMM-204pin-PC3-12800S-1600MHz/dp/B00CZLHNCK/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Samsung 2GB DDR3 Memory SO-DIMM 204pin PC3-12800S 1600MHz</a>&nbsp;but it didn't work in couple as expected : as a matter of fact, the MBP 5,5 supports up to 1333MHz but can downclock higher-frequency RAM if and only if it's coupled to a lower-frequency one. So I could make only one Samsung PC3-12800S work along with the original Samsung 1GB PC3-8500, ending up with 3GB.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive