I’ve had experience with the Vigoro Spathiphyllum, and it's quite similar to other peace lilies in terms of care. It generally prefers indirect light, and the soil should be kept moist but not soggy. I didn't notice significant differences in bloom size, but consistent watering can encourage more blooms. For shiny leaves, wiping them occasionally with a damp cloth helps, and you might add some leaf shine sparingly. How's the light situation in your space, and what size are you aiming to maintain?