I’ve had Magneto since it was first released, and love it. My focus is melodic ambient music, and the Magneto is slanted towards musical applications. You can use it for experimental work, but the controls and workflow are generally designed to produce musical results. As others have noted, the lack of cv control over individual head playback level is unfortunate. The build quality is first rate, and the Magneto packs in a lot of useful functions. The tape effects, and “spring” verb are high quality algos. If you’re not into effects/lo-fi processing, the Magneto is probably not the right choice.
Aside from the effects, the sound quality is immaculate. The different options of multi-tap delay, looper, and sampler are easy to use and useful. The signal flow and associated controls are beyond most eurorack modules–everything can be dialed in precisely–gain staging is a snap.
Strymon has a bunch of Magneto videos that cover the majority of functions–worth watching the full series. Magneto is a fairly big and expensive module, so I’d make sure you’re on board with at least most of the functions before jumping in. If you’re looking for something wilder and more experimental, the Bastl Thyme looks like an awesome alternative.