I have used both and found Crystal clear better, but have you used the ones from Lullaby Conceptions (on-line)? they are cheap and great! If you cant wait for postage then try crystal clear, and dont spendmoney on the digital ones either - its the same thing, its just that it tells you in words, but if you pull out the cartridge you pee on - it will still show the lines as per normal hpt's.

BOL
Lisa