Purely anecdotally just driving a couple per day. The reliability doesn't seem great, but that seems to be because there's no recovery time in Park Lane. The other night I was driving a 63 that came in 20 minutes late, The previous driver took it over as a 61 already 20 minutes late, that it lost on the 62 earlier at school time, it did a 33 after the 61, then turned into the 63, then after that a 35 then 32. Staying 20 minutes late the whole time. If each one had 5-10 minutes in Park Lane after peak time then maybe they wouldn't be as bad, but they seem to go out on the next service almost immediately.