| I personally have no direct experience with the Bellagio WPT chips; however, the regular WPT chips are not too bad; although they are not "real clay" either.
If you like the looks of the set, I would recommend you take the plunge: the price is higher than dice chips, but not so bad that if you don't like them when you get them in hand, you could probably re-sell them and break even. You could also "regift" them if you don't wish to keep them for yourself.
All in all, what constitutes a great chip is up to you - if you like the look and feel, it doesn't matter what anyone else thinks.
One last thought: I can't actually tell from the pictures how many denominations are included (it looks like four or five - either my eyes or the pictures are bad), but three denominations for 500 chips is pretty good. Most people get too many colors in a smaller set and end up with a less than optimal mix. Three, maybe four, would be good, but five may be too many for your game, depending on what structure you use.
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