Black Mesa is an almost perfect remake of the original Half-Life, which is in my opinion better for newer players and improves upon many aspects that were not fully utilised in the original game. I would like to point out that at times the "Xen" and "Interloper" chapters drag on and are at points unnecessarily long - but the challenge, gameplay, and music is generally very consistent throughout the whole playthrough.

9/10, would recommend.