Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I went to [local store] today and purchased this unit, RioVolt Sp-90, mainly due to its amazing price[money] with [money] mail-in rebate. Then I returned home and tested this unit with 167 songs burned into a CD-RW disc, and the result is outstanding & impressive!!! This player is skip-free(I banged the player a couple of times while it is playing to see it skips...not a single time!), fully functional, has killer sound-quality (almost the same quality as my computer speaker), aesthetically pleasing design, and comprehensive/self-explanatory controls. Some things I am upset about are that it does not include AC-Adapter, so I spent another [money] on a battery recharger. The loading time is relatively long, almost 15 seconds(I don't know about SP-90 version 1.00 firmware because I upgraded to SP-100 firmware immediately.), the switching time between songs while CD is not moving is kind of long, about 2-4 seconds..but when the CD is moving, it's only 1 second. However the excellent functionality of the player makes these cons look not as bad. Overall, I am very pleased to own this unit and it sure worths my [money](after rebate). I encourage anyone who's interested in buying MP3/CD player to buy this unit!

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