ShortPixel Image Optimizer - Any Catches Once Used?

I am a photographer that self hosts my own WordPress install at home and when I first began my journey, I didn't know any better and uploaded images straight from Lightroom without optimizing for web first. Now I have gallery pages with images as large as 4MB, and with over a thousand images linked throughout the site, manually fixing them isn't realistic.

ShortPixel seems like the right tool specifically the one-time credit pack, Glossy compression, JPEG only (no WebP). My understanding is that it recompresses in place, same filenames, same URLs, nothing breaks. Once the bulk job is done I can delete the plugin or leave it inactive and everything stays as-is since it's just smaller JPEGs sitting in the same spot.

Is that accurate or am I missing something? Any catches with this plugin I should know about before pulling the trigger? My biggest fear is being dependent on it.