[mezentius]

It’s great. I’ve been running iDOS regularly on a 3rd-gen iPad Pro, at 26800 cycles (roughly a 486DX4 100Mhz). I can run every DOS game well supported by DOSBox, write in WordPerfect 6.2, install and run Windows 3.1 at full speed, and compile and debug code via Borland C++ 3.1/4.6, or OpenWatcom 2.0. The file system is easily accessible through the Files app, so I can transfer files in and out without tedious mounting of images.

My only (and very minor) complaint is that it relies on the ancient DOSBox-0.74-3, rather than one of the forks with broader support and better emulation of exotic hardware, like DOSBox-X.

With regard to UTM SE, I’ve had mixed results as well. For best results, I recommend installing Windows 95, which was very performant. (Otherwise, keep in mind that the SE stands for ‘Slow Edition’ — really.)