If you're on an E190 with the 1x2 section, the 1-side is barely deep enough to hold a six-pack (hey...there's an idea) but the bins over the 2-side are larger than the normal E190 bins. My roller bag easily fits straight-in like it does on the Airbus, while it only fits cross-wise in all other E190 bins A guitar *may* fit, although it might take up just about all the space. In my mind a guitar is huge and wouldn't fit in any bin on any aircraft, but that's perhaps not an accurate mental image.