The 14mm s5000 UWA is one of the worst I have looked through.
http://www.iceinspace.com.au/42-245-0-0-1-0.html
That having been said these are not a scaled design and different focal lengths in this series perform very differently, with some being very good and excellent value for money (not close to the best I have used in any focal length) and some, like the 14mm being very poor. If you do buy any of these make sure you only buy the focal lengths which are known to be good performers and you will get a very good eyepiece at a very good price.
Cheers
John B