I have been employing one off and on for the past six months. She charges 130 for four hours but I give her 150.
It's been helpful. My main problem is that I have a small cottage that over the last 15 years has become the repository for items from deceased relatives, making it grubby and overstuffed.
Working alongside her makes it easier to discard (donate, recycle, etc) -- she says things like "You can remember your gran without hanging on to her aprons..."
I have Freecycled or donated a number of small furniture items, bags of clothing/textiles, and identified several car loads of broken/dated items to be recycled. It is a relief and has spurred me on. Am enjoying my home a bit more.
Taking pictures helps me part with things. As does telling her the story behind certain items before they go off to their fate; it's sort of therapeutic. She understands this and encourages it (unlike friends and relatives, who get exasperated.)
Like others, I wish she would add to her services the ability to actually carry things off -- I still am stuck with getting discards to their new homes or responsibly disposing of.
If you decide to offer such services, another thing she includes at no extra charge is setting up 'homework' before she leaves -- storage bins to sort, etc., and texting me several times in the following week or two "set 20 minutes aside to go through Bin B and send me a photo with the results." Sometimes this is annoying but it does prod me to make progress.
She also, at her own behest, cleans. She asks for a broom, etc. and always sweeps and dusts the areas she is working in, even the garage. It helps.
She sets a timer on her smartphone when she arrives to ensure that the client gets their full allotment of time; if we digress into chitchat she stops the timer (which I don't think is necessary, but she is scrupulous about providing full value for the money.)
She markets herself on Facebook with non-outing before/after pictures taken at client's home. I once saw her promotional post with a horribly messy garage on it ("before") and thought "whoa, people who are even more slovenly than me!" before I realized it WAS mine. LOL.
She tells me that the husbands of her clients almost always pooh-pooh and protest about "spending money on a thing like that..." and that it's the wives (or solo women) who are hiring her as a birthday or other gift to themselves, or as part of self-care and sanity-saving.
She's even coordinated packing for a multi-prong move where some items go into storage, some go to temp accommodation and some go to the permanent home -- color coded, etc., and was there to supervise removal men. And she's only been in business a year or two but is getting plenty of referrals via word of mouth.
My only quibble is that sometimes she tries to be TOO directive -- "You have 200 magazines here; pick 20 and the rest are going into recycling." No, magazines are important to me. And she has "systems" that she likes to stick to; I feel that last weeks' 150 quid was rather wasted because she embroiled herself in shuffling items that didn't really need it and overlooked the two tasks I really wanted done that day (sorting old electronics and a cache of photos/frames/etc that needed to be organized and put together.) I was bouncing between WFH and working with her and she didn't really listen too well to what I stated when she arrived. Next time I will write out what I want.
Per the above, there is a difference between wanting someone to take over, and just wanting an extra pair of hands. I want about 70% extra hands and 30% her ideas/input/listening but other clients just show her to their office, playroom, garage or whatnot and say "Fix this" and walk away. So you need to be clear on what you are offering vs what the client expects.
Providing a list of places to donate, recycle, etc. would save the client time and research, if you can't remove things as part of your service. Or have a partner, even a teen, who will swoop in and do a pickup of all discards, and disperse appropriately, after you leave.
Hope this helps.