(13 Jun 2015, 7:24 pm)South Tyne Lad wrote The 61 Reg Enviros have been a lot worse in reliability the MAN Enviros recently, the 61 Reg Enviros have worse build quality, Frequent Engine Troubles and loads more.
The MAN Enviros have had their past troubles but the ones at Shields have improved significantly with only 39710 being off the road recently , whilst some 61 Reg ones I think have had to get major work done on them ( engine rebuilds etc )

Based on a customer opinion, they would 100% prefer a MAN Enviro over a Normal one there ride quality is better, you don't feel every bump in the road and there more powerful 
Based on a maintenance opinion there both neck and neck they both have there problems.

There are several videos on this YouTube channel showing how bad ADL E200s can be - especially in hilly areas. The common "squealing/screaming" turbo fault is also a really bad disadvantage of an ADL E200 - as demonstrated in this and this video - faults of which some of the South Shields ADL E200s have had/still have.

Furthermore, the MAN E200s have less idle vibrations than the ADL E200s and Pointer Darts, which makes the ride much more comfortable - which I assume is a reason why the ride quality is better in the MAN E200s.