No complaints from me about Eberlestock, other than the expense. Very well made, if a little heavy. The G4 is close to ten pounds empty, IIRC. I've had it for several years now. They also have a "hunting" line of packs, which are identical to the "tactical" line with the exception of the material used. IIRC, the "hunting" line is made with 500 denier material vs the 1000 denier of the "tactical" line. A little bit lighter weight and I think they are slightly less expensive.
I suppose I do have a complaint, but it's not Eberlestock exclusive. Nobody makes a pack that will fit my wife. She's 4'6" tall.