I've been using the old style elasticated Trion:Z bands for around 20 years and have around 10 of them in different colours so decided to upgrade to the new Zen Loop Duo in black. There's no give in the band so you need to ensure that you get the right size. The magnetic clip is a bit fiddly at first but you soon get the knack for putting it on (I don't wear mine when in the shower etc) it's well made and is aesthetically pleasing. Only time will tell if the anodising will chip / start to rub off or the bands start to fray. The only disappointing thing is the current availability of the other Zen Loop Duo bands in different colours in size XL, these are all currently unavailable on the Trion Z website... supply and demand....??