I browsed the forums for first hand experiences with ADA Aquasky. To save others some time I compiled a few posts that others might find useful.
=> Review and excellent aquascape by viktorlantos from ukaps.org
=> Clearly waterproof as pointed out in review by MAXIMUM Iannella, from rareaquaticplants.com
=> Words of caution by Green_Flash, from plantedtank.net
=> Words of caution by ADA
=> Review and excellent aquascape by viktorlantos from ukaps.org

=> Clearly waterproof as pointed out in review by MAXIMUM Iannella, from rareaquaticplants.com

=> Words of caution by Green_Flash, from plantedtank.net

=> Words of caution by ADA
=> Words to consider by Blue_Bolt, from scapeclub.org
=> Comparison of one aquascape portrayed with Aquasky and Solar. Albeit a poor quality film it clearly shows the increase in brightness.