FLY 3 Pack BK : Good sounds but...

I ordered this pack in order to use it as a practice and late night jam amp. The first impression was "wow"... Very good sounds you wouldn't expect from an amp this size. The tape style delay is a very good add on, I mainly use it to add a pseudo reverb, but it can also be used as a short delay for lead sound. The line in is great for the main reason I bought it, practice, you can use your phone to play backing tracks or lessons (or use it as portable speaker). The emulated out is "good enough" for a few quick recordings, but I like the speaker sound more.

That said, I noticed a little hiss/digital noise on my amp. I contacted Blackstar and sent them a sound clip, and they said that it sounds as there is something wrong so I sent it back and got a replacement, which had the same issue. It's not a problem that makes the amp useless, especially if you use high gain sounds, but you can notice it on the trails of "cleanish" sounds, and disappointed me a bit, but not enough to return it.