I own a lot of pairs of headphones, due to the work I do, etc. Currently I think 7 pairs.
I've owned two pairs of Major II's, a pair of Major IV's, still own Monitor III's, and now the Major V's.
They have the best battery life out of any other headphones ever. I use my headphones for 2-2. 5 hours every single day hiking, and I only need to charge them around every 5-6 months.
My Marshall Major IV's lasted approximately 2 years. They still work great, but they're destroyed from wear, sweat, etc. They are still 100% functional, but just like every other pair, they take a beating, and are worn out physically.
They have the great bassy Marshall headphone sound, which I love & prefer compared to Sony / Bose. The first MAjor II's blew my mind on that.
The great thing on the Major V is they have a custom equalizer on the app, which the Major IV's did not, which I loved on the Monitor III's, giving me 2 equalizer settings I can switch between for music and audio books. They're switchable with a button on the headphones, which is great.
If you're considering buying these headphones, know they're a little bassier than other headphones, but not muddy. The equalizer gives you a lot of control over the sound, which means you can get whatever you want out of them.
Best battery life, no noise cancelling (which I prefer while hiking), great sound, and last forever.
Worth every penny and then some.
Make sure to buy an extra set of ear pads when you purchase. They last a couple years, but eventually will break. This is not a problem for me, as the rest of the headphones are usually worn out too, from hiking, and wear and tear. This has been greatly improved since the Major II.
I always forget to buy them, and just end up buying a new set of headphones anyway, because I love the upgrade.
Worth the extra few bucks, to extend the life of the headphones a little longer.