I've used the Legacy 2 for about one month straight now but, when I recently got the Tin HiFi T2+ and the KZ X CRN Zex pro, I wondered why this IEM cost so much.
The bass is punchy, highs aren't peaky (even at high volumes), good imaging for gaming (Rainbow 6 Siege), decent sound stage, good mids, and an overall safe-sounding IEM. It also has great packaging, a good case, great cable, usable stock ear tips, a seemingly universal fit, along a great overall package.
Highs lack the "air" and imaging capabilities that the T2+ have, lacks bass extension, is not as great as ZEX Pro in critical listening, and is perfect at being average with no specific traits that scream 100$.
I bought this IEM as a replacement for my ATH MR7, and in that regard, I find the L2 better than the MSR7 in almost everything except the sound stage. I like the looks of the IEM and its performance in-game but, I can't justify the price for casual/critical listening and using it for games that require good positional audio.
Buy this IEM if you want to blow 100$ on something that you could use to listen to anything without expecting great detail, a breathtaking sound stage, or any stand-out features. It's not something I'd recommend when better alternatives at a lower price are present.