Well, considering the drive that burned those disks, was broken, this could be seen as normal.
Although one shouldn’t extrapolate results taken from an isolated case such as mine, this particular example (good burns produced by turning “Solid Burn” on), illustrates that "Solid Burn" can actually do wonders, since it managed to produce a good burn, out of a wrecked drive. It looks like “Solid Burn” compensates, not only for low quality media but for defective drives too (at least the kind of defects mine had).
On the other hand, there is one case where you shouldn’t activate “Solid Burn” and that is when over burning. That would have as a result, another coaster (I can’t even remember how many discs I’ve wasted these days, doing various “tests” :D)
At least I gained some knowledge out of all this mishap…
Over Burning Scans
“Solid Burn” On
“Solid Burn” Off