This is the physical release in terms of value. Released in 2012 in Spain, this giant box set (often a cardboard slipbox with slim plastic cases inside) is the only official complete collection.
Streaming services often update theme songs or edit episodes for time. The Física o Química DVD sets preserve the original broadcast versions. Most importantly, they feature the iconic opening theme, "Puedo Ser" by Nomadic, a song that instantly transports viewers back to 2008. fisica o quimica serie dvd best