I don't know what the pros and cons are, or if its the "best", but what I do know is Bluelab sells high quality products and I've never seen or heard anyone complain about there EC or PH meters/pens. So you got a great ppm pen/meter.
yeah the bluelab is worth the money if you're looking for quality. just be careful while using the ph probe and you'll never have to buy a meter again. the thing i like about it the most, is that you don't have to calibrate it often as some others.