Sloggi bras have been around for a whlie now, advertised as a comfortable, underwired, seamless and sexy t-shirt bra. These bras cost around 15 pounds, give or take and they are of excellent quality so I would say that they are worth the money.
I have a few and they are all extremely comfortable and fit perfectly. The straps don't go as short as I'd like, though, which is kind of annoying.
Also, the straps are kind of thin so anybody with breasts bigger than a C cup may find there is not enough support in this bra.
The seamless qualities advertised are --- okay, these bras don't jut out or anything but if you're wearing a tight lycra tee they are blatantly there.
I love the material that this bra is made out of, and I like the wide array of colours. This bra is attractive, and it comes in other styles, like 3-way and racerback.
Overall, I think this bra is comfortable, versatile and attractive. However, it is not outstanding and doesn't do anything special like push up, or have a fancy design.