Ya I've done it before. I spend my first year or so when I first started lifting hitting everything twice a week. I would so chest tri, then back bi, them legs delts, off day and repeat. I build a lot of my base doing this and it worked great. I wouldn't really so heavy and light day tho, just like first chest day I would use db then the other day bb. Recovery is also a little easier when your a noob so I didn't really have to adjust the volume much, I would do 12 sets for the big muscle and 9 for small. I stil do this split from time to time and I really like it but I have to lower the volume a little. I'll do like 9 sets for big muscles and 6 for the smaller. It honestly works great for everything except my arms. They just don't seem to grow when I do them after chest or back they need there own day when there fresh. But it works great for everything else. If my arms weren't my weakest muscle group I would do this split a lot more often. You kinda have to deload or take a rest week or an extra few days more often tho cause lifting 6 days a week really beats up the central nervous system. But def a good way to change things up. I might even do it during my next bulk cycle durinf my 4 week dbol kickstart. It sounds way more appealing to hit everything 8 times during those 4 weeks then only 4.