I perused many reviews of many speakers before settling on this one, and the word "settled" is misused here because this speaker is absolutely fantastic.ConstructionThis speaker is made from quality materials; you can tell as soon as you pick it up. The rubber coating provides excellent grip and is easy to clean, the included strap is very sturdy, not weak, and you can tell this can survive being knocked about a little bit without circumstances. I'm surprised the mesh is made from plastic, not metal, but they did have to cut a little weight somewhere because this is not a light speaker. The weight does not bother me, though.Portability:This Middleton speaker is portable for me. You'd think that at this price point, a hard-shell cover would be included, but you can find those relatively cheap on Amazon here. ($25 will get you a good one). It's easy to carry around using the strap, and it should fit into just about any laptop backpack you have, but again; this speaker is not small and it is not light.I travel a lot, and I've had this speaker with me on Safaris, out in the desert, in the shower, in the middle of the ocean: it never let me down or inconvenienced me while I was on the move.Sound:The sound quality from this is great, but I would not call it excellent. I'm surprised that a speaker that costs $300 only supports SBC, no AptX or LDAC. Shame on you, Marshall. Despite that, the sound is still great and fills even medium-sized rooms with resonance. The added bass and treble controls are handy, and once you set your preferred levels there you probably won't touch them ever again.If you use the Aux port instead and connect to a source that outputs lossless quality, the sound changes dramatically for the better.The App:The app is very wonky. Sometimes it won't detect the speaker, especially if it's already playing music before I attempt to make the app. Connecting another Middleton for stacked play can be hit-or-miss. When it works, it's wonderful. I wish that When two or more Middletons were connected the app would split stereo into the two speakers instead of giving you the exact same sound from both.Customer Support:Customer support is among the best I've ever run into. My first speaker was damaged under warranty, and I was shipped a brand-new replacement immediately after going through the warranty claim. No delays.Charging:If I were you, I'd get a GaaN charger that's at least 100w with a 100W USB C-to-C cable to charge this thing. Regular USB chargers still work, but they take a lot longer. Also, bear in mind that there is no battery care in this device's firmware. (Why, Marshall, for a $300 speaker????). Once your speaker reaches %100 charge, it does not automatically stop charging, so keep an eye on it and disconnect it immediately. Don't leave it charging overnight.Niggles:1. The mesh covering on the front is pushed into place, not secured by any screws like the rear mesh. This is weird. Though this speaker is built so sturdily that there is practically zero chance of it ever popping out unless you're playing football with it or something.2. Marshall does sell spares, which is ridiculous. If the charging port on your perfectly-working speaker gets damaged outside of warranty, you have to throw the whole speaker away, rather than being able to buy the little board with the charging port online somewhere. This is unacceptable in this day and age.Overall: I love this speaker, and I will never look for another portable Bluetooth speaker. This satisfies all my needs.