Heard mixed reviews about Lens Turbo but then decided to give it a shot and I must say I am impressed - you can't go wrong for $165. I bought PK version which is a bit shorter than the regular PK adapter. No more words, just pictures.

Lens Turbo + Pentax A 35-105mm

Note: These pictures on Facebook which recompresses JPEG

Lens Turbo + M50/f1.4