Pentax PK/DA to NEX adapter choice

I have narrowed down my selection to one of two 'no name' Pentax PK to NEX adapters with aperture ring, each in the order of 20 pounds.

http://www.ebay.co.uk/itm/Pentax-Mount-DA-lens-to-Sony-E-mount-NEX-Adapter-NEX-5-NEX-3-NEX-VG10-NEX-5C-/250942456145

http://www.ebay.co.uk/itm/Pentax-Mount-DA-lens-to-Sony-NEX-Adapter-NEX-5-NEX-3-NEX-VG10-NEX-5C-/260860084144

Could any of you guys that have had any experience with any of the two models please advise if any issues, quality, etc?

Many thanks

P.S. I've noticed the Kipon version as well, but at 60 pounds I thought I'd better buy the Sony 30/3.5 lens and get AF, even if a bit slower (I need the adapter for the Pentax 35 macro limited).