Is a three-prong setting less secure than four-prong?

Three prongs hold each diamond with less metal than four, so more of the stone is visible and it sparkles more. The trade-off is that the girdle is more exposed, so it is easier to chip against hard surfaces. Treat it as a dress bracelet rather than one for heavy daily wear.

How does 5.08ctw compare with typical tennis bracelets?

Most tennis bracelets sold today total around two to three carats. At just over five carats this one is roughly double that, which means larger or more stones across the same wrist length and a noticeably heavier feel.

Will the white gold stay bright?

14k white gold is alloyed with white metals and usually plated with rhodium for a bright finish. That plating wears with friction and needs re-plating every year or two with regular wear to keep the original look.

Can it be worn every day?

It can, but the exposed three-prong settings and the weight make it better suited to occasional wear. If you want a daily bracelet, a four-prong or bezel-set line is more forgiving of knocks.