However it is a sturdy and durable seat
920161
The shade was right for me. I wanted to use it with an English made toilet but it did not fit so I gave it away. However it is a sturdy and durable seat ,well-priced and well-constructed. I recommend this item
732823
Kind of difficult to secure to the seat with the metal attachment devices.  however, other than that, it seems fine
3093615
The sides are a little more flexible than I would like, but still very sturdy and safe to sit on at 175 lbs.  Overall I'm pleased. Thanks!
3532071
I has only been a week, but so far so good.  It appears to be a sturdy, well-made, nice looking toilet seat which was easy to install on our Kohler toilet.  About the same time it was delivered, I received an email from the company with a .pdf attachment showing excellent installation instructions.  It is pricey, but we are hoping this eliminates buying a new seat every few years.  Previous seats we've purchased have been made of wood and cleaning has eventually damaged the surfaces.
1820211
Very sturdy seat for my toddler, he feels secure and we feel secure pushing him in it.  Did not have any issues attaching it to our swing set.
1003497
Very sturdy seat.  Purchased for a larger person and its a great size and very comfortable.  Would purchase again.
170453
This seat cushion is constructed of very durable material and is comfortable. I appreciate the carrying handle and the non-skid surface on the back side. My only reason for not rating this product as 5-stars is that is smaller in size than most other stadium seat cushions that I've seen.
3246027
Solid - my kid can sit on it and it holds up to a lot of abuse.  This is a good quality piece.
1298558
Really SOLID!  I weigh 270 lbs and it is comfortable and sturdy.  One drawback is that it is a little bit too wide, but that just makes it roomier than other chairs.
2768831
Durable and sturdy, a little hard to clean in the ridges but I wouldn't trade it for a smooth one
678039
It is built with Radio Flyer quality that last a long time. I bought this because of the quality and flexibility of adjusting the seat as the child grows.
3889734
3 years of using it, this is a very nice seat. My first child now is getting older for it. Now i am using it for my new child :)
617548
I am going to do this review in 2 parts, so you know about the product itself and also the installation process.

The seat:
This is VERY heavy duty kid's bike seat.  It is molded plastic with a foam cushion for the seat-the seat itself isn't terribly comfortable-after about 15 mins my 5 year old starts complaining it's hard on her backside.  It has straps that are about 1" thick and lined with a nice pad for comfort when it's over your child's head and locked into place.  The foot rests are adjustable so this seat can grow with your child.  It also holds a kids up to 48lbs which is considerably more than the 30lbs most of the cheaper models are rated to.  Another feature I really like is that it has a lock/keyhole on it, so when it is secured to the bike, you can lock it on to prevent theft.

Installation:
This is pretty easy to install on any standard bike.  We have used it on both my cheaper "cruiser" style bike, and my husband's higher end road bike.  It fits on both.  Installation is fairly simple.  You secure the slotted piece around the bike and then just slide the metal bars into it.  It is very sturdy and if you purchased additional slotted pieces you could easily move the seat from one bike to another simply by pulling it out of one and sliding it into the other.

Overall, this is a VERY high quality seat that you could use for a long time (comes with a 5 year warranty).
2872969
After a month of use I am glad to have it.  Solid construction and attached easily.  Take time to attach to the seat and it should work well for you.
2536755
It's a quality constructed Seat, I just find it fairly uncomfortable to actually sit on.
4275408
I love this seat! I put it together in less than five minutes by myself. Very robust and so-far it is weatherproof. I keep my various pool chemicals in it in the shade of my back patio. Still opens and closes easily after a year of use.
3292496
Update:  I have now been using this seat for 2 months.  So far so good as far as no split seams.  It is thick and well padded so we have to keep the tank cover slid back against the wall so the seat won't fall down.  Otherwise, it's the bomb.

Finally a sturdy toilet seat.  And it doesn't have the normal screws in the back to mount it that always get stripped out - it has these turny things.  Very nice!

10/20/15 Update:  It split on the inner seam at 2 yrs., 5 mo. of age.  I have another Mayfair, oval seat, that is covered more loosely so I'm hoping it won't split as easy as the tighter covers.