My convertible crib didn't come with a built-in rail for the day-bed configuration, so I went hunting for something to keep my son from falling out. Other than the pricier wooden kind, this was the only one I could find, so I figured I'd give it a shot.
The instructions & assembly were pretty straightforward, and I had no trouble putting the rail together. Attaching it to the crib was just as easy, as well as sturdy. The fold-down feature is smooth and much easier than the double rails from Summer Infant that are on my daughter's bed. I've been very happy with this rail, with my only "complaint" being that it isn't the nicest-looking thing, but it does the job.
Let me specifically address some of the points from the other reviews on here. Some said that the rail didn't fold all the way down for them, but was at an angle like a ramp, tempting the kid to climb on it. I don't have this problem at all - when I fold it down for changing sheets, it hangs straight up and down and cannot be climbed on. However, I think this may be because the lowest mattress setting on my crib seems higher than others I've seen. Those that say this goes on an angle probably don't have enough room between the mattress and the floor for it possibly to hang straight down. That's not really a knock on the rail, it's just the way it works with the mattress so low.
Others said that the silver "buttons" that lock the rail legs into place are facing up underneath the mattress, so that if your kid jumps hard enough on the bed, it can depress them and the legs can come apart. This is another issue that I do not have - the silver buttons on my rail are facing to the side. Perhaps DEX became aware of this problem and made an improvement since this item first came out. (I purchased mine in the fall of 2012.)
There was also one review that noted this rail did not work with their Jardine Olympia crib. This is the model crib I have and it DOES work. The only thing is that there is a wooden piece that matches the crib which is designed to go across the front to hold the mattress in place and give the bed a finished look. Because this piece comes halfway up the side of the mattress, I think you'd be hardpressed to find any sort of rail that would work with it. The solution is to simply leave this wooden piece off. Again, it makes the bed not as nice-looking, but it works just fine and in my eyes it beats having my son fall out of bed every night. By leaving this piece off, the bedrail is what holds the mattress in place, but since the bedrail has to be fit quite snug anyway, it works just fine.
And finally, some said the mattress could not be in the lowest position to use this rail. This may be related to the problem of the rail forming a ramp when folded down, or it could be that the rail somehow prevented using the lowest setting. This was again something I did not encounter at all. I did have to tilt the leg anchors to get them around the edge of the chainlink mattress support because of where the wooden slat for the back of the crib is, but it was not difficult and worked just fine - with the anchors in place, there is plenty of space between them and the wooden slat, so there's no damage or issue with fitting them on.
Again, I am quite satisfied with this rail, I just wish it looked a little nicer when installed, but I can't complain in finding something that works for half the price of the fancier wooden kind.