First of all, everyone should realize that this CD is not a music CD to the PC Engine Ys 1 & 2. This CD came out in 1987 and was before the PC Engine game. Therefore, it is very unfair to judge this disc by its PC Engine counterpart. Instead, this is the original soundtrack (they should have labeled it that way to avoid confusion and disappointment) to the Ys music on the personal computer.
The general perception on this disc is not good. I must admit that the first 34 tracks were recorded in such a way that rivals most of the MIDI files found on the net and would probably bring back the sweet memories of Ys on the Sega Master System. However, from track 35 on, you'll notice there is a diamond collection under this pile of dirt. So, take out the diamond and throw away the rocks. The very best songs in senses of composition and excitement (in fact all these tracks were later used in the Perfect Collection disc) are arranged in a way to rock the house down. As a bonus, they included the score sheet to all the used music in Ys. I really liked this disc.
I must have listened the last five tracks a million times before got rid of this CD (I bought Perfect Collection). So to those who don't want to spend $40 on Ys Perfect Collection, this Music from Ys is recommended.