Mine (just completed on fleebay) is a proper Pentax viewfinder magnifier. My budget right angle one needs refocusing when zoomed which rather defeats the purpose.
Getting a newer Pentax DSLR (for the better low light performance/extra MP/live view/faster AF etc.) is a wish that might have to wait a few more years - unless my wife really catches the photography bug during her current art/craft foundation degree.
In any event the current K100 will be kept for its IR performance