inputs.text: upgrade prs505 prs600 - using prs505 since jan 09 loved wife wanted reader well figured id give mine mint condition upgrade really like 600 boasts lot new features missing 505 built dictionary handy saves time look words time time simply double tap word theres definition new design sexy like feel matte finish back device pros touchscreen pretty handy rather responsive quick swipe left right changes page find convenient still button page turn thats prefer interface pretty nice view library title cover art included right spine stylus draw notes pages freehand drawings separate application also use finger internal memory bumped 100mbs 350 believe store 250 books internally device also two slots external memory sd card sonys memory stick pro duo built mp3 player yet use feature old 505 current 600 added also search feature use onscreen keyboard cons readability slightly hindered due extra layer touchscreen not dramatic 505 noticeably legible lighting conditions also due touchscreen screen much reflective gives glare held certain positions bit heavier 505 honestly dont consider con really like devices feel like cost bit money light think would feel cheap black unit slight fingerprint magnet front may disagree like look flawless time noticethem nothing soft cloth cant fix im glad upgraded lovely reader like something different kindle users im pleased