The crazy thing about pedals is...it's all personal, in other words just opinions, I don't think there is a really bad clipless pedal on the market, it's whatever you like. I happen to like Speedplay Frogs, I use them on my touring bike and on my road bike because I like a pedal that allows me to wear a shoe I can walk around on if I have to without having a lump in my foot while walking. Speedplay's are light; have greater cornering clearance; can be serviced by me with a simple grease gun thanks to the injection port, can be rebuilt very easily if needed; won't clog up with dirt; has a non centering full float; very fast, easy and simple to get into and get out, of plus dual entry so I don't have to fumble with the pedal to get the right side up; and no weird and confusing adjustments because there is no spring retention to depend on and thus a very minimalist design and thus very dependable. They come in 3 different price ranges with the lowest range having a cromoly spindle, the mid having stainless steel spindle (the ones I have), and the highest having titanium spindles. Of course you do have to make sure you get the right shoes, Speedplay has a list of shoes on their web site.
Are the Speedplay Frogs (or their other models) the best pedal? again, that's all just what a particular person likes, and you have to choose what you like and what you want the pedal to do for you.