saddle seats are they any good ?

been thinking about buying a saddle seat like the one in the ms magazine but i would like to know if anyone has any experience of using them and what they think of them.they seem to quiet expensive but they look like it could be really useful for me getting around in the house helping me try to do things around the house that i do tend to struggle with now.with money being tight now i want to be sure that i won,t be wasting my money on something i,ll find not as useful as i if anyone has any advice about them and if anyone knows a good place to get one from ,i,ed be greateful for any info

take all of you xx