They have potential issues with cable damage because of the lack of strain relief. Standard Hope- slightly dubious product but they’ll fix it if it breaks. Downer but not dealbreaker imo.
The R4’s a good light- the whole 4xXPG format is pretty effective IMO, it’s not stupendously bright but it’s very usable, lovely beam pattern. Definitely don’t get the lightweight battery, it’s stupidly small but the standard 4-cell one is alright.
Elephant in the room though is that the performance is basically identical to some of the quality far eastern lights, like the magicshine MJ856, which uses the same 4xXPG format, and costs £80 (and before someone says it, it’s not like the cheaper magicshines, it comes with a decent battery and charger). The bar bracket isn’t as solid, but the cable has better support so they’re pretty much matched. I’m not a fan of the cheapos but the upper end of the chinese lights are brilliant options ime.