The direct translation of this phrase into Hindi would be:
बहुत अच्छा लग रहा है (bahut achchha lag raha hai)
However, depending on the context, other Hindi phrases might be more appropriate, such as:
* मुझे बहुत अच्छा लग रहा है (mujhe bahut achchha lag raha hai) - I am feeling very good.
* मैं बहुत खुश हूँ (main bahut khush hoon) - I am very happy.
* मैं बहुत अच्छा महसूस कर रहा हूँ (main bahut achchha mahasoos kar raha hoon) - I am feeling very well.
The best translation will depend on the specific context and the intended meaning.