I'm not comparing him to Ray Allen as a great shooter of all time or anything, but Lee's career shooting % match up pretty evenly with Ray.
Ray's Career shooting %
45%FG'S, 40% 3PT , 89.4 % FT
Lee's career shooting %
44% FG'S, 38.6% 3PT, 83% FT
Last year Ray played 3 more mins per game and only averaged 3 more PPG (14ppg) than Lee ( 11 ppg).
Lee would fit perfectly for what this team needs at the backup SG spot. He is only 26 years old so there shouldn't be injury problems like with Ray. Lee has been very durable playing 77,71,81 and 58 games(out of 66 last year) .
He gives us another guy to get up and down the court with Rondo, Can play pretty solid D on Wade, Kobe types , and he can spot up and knock down the 3 .
He isn't the clutch shooter Ray is , but that's what Terry is here for !