I have the Maclaren Twin Traveller that my sister gave me and I agree that it is very difficult to push. I find the handlebars very wide apart and my arms get tired very easily. Also, I am constantly kicking the middle wheel, and I am not tall.
Up until now I have used it for DS and DD who are significantly different sizes. I have been told that it is easier with twins. At the moment I plan to keep it because this way I don't have to buy another stroller for the twins, but if I were buying new I would also consider the Inglesina. In fact, if I find I am using the stroller often and really continue to hate it, I might just end up buying a different stroller anyways.
DS - 10
DD - 8
Twin Girls - 6