Used these almost daily for years and years, still look and work like new, bombproof.....if a tad large compared to roof prisms.
These rarely leave the house so it doesnt matter, but they are over heavy.
They perform better than expected, for 150-180 I think they are on par with my leicas in normal conditions, very good quality image, fantastic colours and easy to view through for long periods.
I bought mine as a decent inbetween that i can lend out tomoli and live on my windowsill.
A very good buy.