So far so good................holds power at least as good as the Canon originals. Longevity will only show with time but to date .......very pleased considering the cost- I will probably order another shortly. Postage for 1 was free, oddly for ordering 2 at the same time would incur a postage charge at the time I purchased. Therefore if you want more than one ..order individually!
Excellent handbook with superb illustations and crammed with up to date information. As a 'returning' birdwatcher (albeit with less time & poorer eyesight!) this handbook has proved to be an excellent guide. Kept in the car...its useful as a reference guide just for watching from this 'hide' or carrying with you out of doors. Very useful endcovers fold into the book which then bookmark your page(s). Perhaps a little bulky for some outdoor clothing pockets but no problem with most anorak type clothing. Perhaps could contain more comparison pictures of similarly looking species but this would make the book too cumbersome and bulky. Overall a very useful tool for novice birdwatchers and those with medium experience.