Yap.Town

がいいね

is nice

→ が
phrase Uncommon #12,655
is nice が marks what is being described as nice, and ね adds a conversational tone, often inviting agreement.
JA: この店、雰囲気がいいね。
EN: This place has a nice atmosphere.

男同士にしては変に仲がいいね。

You two are unusually close for a couple of guys.

発音がいいね。

Your pronunciation is good.

そいつと何かを合わせるなら…白ワインがいいね。

If you're pairing it with something, white wine would be good.

— アトランティス 失われた帝国 (2001)

そのコーヒーは香りがいいね。

That coffee smells wonderful.

音楽の趣味がいいね。

You have good taste in music.