Known for his exquisite and extended alap sections, Nikhil-ji seems to have an unerring sense of how much of an alap a certain raga requires. It's not just about playing for "As Long As Possible" (as sitarist Josh Feinberg once jokingly described an alap) but rather playing for the "exact right amount of time" and introducing and developing the notes of the raga in just the right way.
Banerjee definitely had a reputation as a skilled performer during his lifetime, but after his sudden and untimely death in 1986 -- and the subsequent issues on CD of extended live performances -- his reputation has shot upwards.
This 1983 LP on Oriental Records (New York, NY) is a reissue of the same LP on Amigo Records.
Tabla by Anindo Chatterjee
An excellent web page devoted to Nikhil-ji: