brash_stryker said:

Personally, I've always thought of "cloaking" (at least within the Star Wars universe) to be just making your ship undetectable to the other ship's scanners rather than literally making it invisible.

This is exactly what I thought too. According to SW Wikia though, if anyone still refers to it as canon or not (at least for this subject), the technology to literally cloak does exist and the Slave I does have a cloaking device (and a jamming array for simply staying off sensors, which is likely what he used while following Han).

In any case, it doesn't seem like something Ady would go for...I think it's been discussed before as well.

This is truth.