Had one fitted by a backstreet garage many years ago and it failed quickly. I had been under the impression they were doing a proper fix.
That said I did resort to one on the back of an E30 BMW a few years later as removing the shaft was going to be a PITA and on the rear there is not as much articulation as on a front axle. It very much depends on how clean you work. Take your time and keep the new boot very clean during fitting and it should be okay. Get grease all over it (CV grease is horrible) and it won’t last.
On my current cars I use Bailcast stretchy boots and have a cone and spray lube. They are a lot flexier than the GKN ones that really need you to split the joint. But you will still need to remove the shaft from the hub to fit. On my cars I know this is going to be easy as they have all been taken apart and re-greased when doing work on them but on a car I don’t know and if I didn’t have the tools then the split one would be worth a risk.