The aforementioned corner protectors, although a bit pricey, are beautiful and very cute. They have built-in stickers and you just have to pull the tapes and place them on the furniture you want (unlike other soft corner protectors that come with double-sided stickers that you have to struggle to place first inside them and then on the furniture). You save yourself a lot of trouble. Because they are made of flexible silicone, they fit corners of any size and protect against bumps. They also stay in place and do not fall off on their own.
The big problem is that they are so cute that it is impossible for a very young child not to start touching them and notice them. Therefore, they will quickly peel them off and not get their money's worth in any way. Overall, I consider them an unnecessary purchase if you are using them for babyproofing. If, on the other hand, you want to place them on sharp corners of furniture, having older children who will not touch them, then it is a good purchase.