MXR is kinda okay. I owned three (the ISO brick and two mini ISO bricks, out of which one was promptly returned) and every of them had or developed a problem. one had a weak connection on the input power (tended to disconnect), on other one a couple of LEDs went bad in a year, the third one buzzes (not in the amp, acoustically) when a 9/18v output is switched to 9v.
this said, I still own and use one of them. owned an Ojai and it was great, except for the bulky power supply (and being slightly less compact than the mini ISO brick), I think, when my MXR will be dead some day, I'll pick an Ojai again. or try a Cioks, as everything I heard about them was 'just great'.
also owned a Pedaltrain Spark. twice. and no complains except of modest output complained to MXR or Ojai.
these are all isolated power supplies (but MXR also makes a non-isolated one). you want an isolated one to actually improve noise. sometimes manufacturers state 'isolated' on non-isolated power supplies and that's why I prefer to stick to the well-known and respected brands. also taking a cheaper power supply could cost you your pedals.
TLDR: get Strymon or Cioks. it's worth it.