I found this Lamaze tummy-time gym rather nice. Comparing to the older model (with garden bugs, which I checked out in a shop) the Sea version is more colorful and I personally like it better with a round matt rather than flower-shaped. I have bought this item when my little girl was 4 months old and I wish I had it even earlier. She usually does not like to spend time on her tummy, but she manages to play on her tummy on this gym much longer than on a blanket or sofa. Of course it takes a few tries to get a baby hooked on a new thing like this, but if you do not give up and try placing your baby on it a number of times I am sure your kid will love it.
ADVANTAGES: great colours, made of good quality materials with a good finish, nice built-in toys (a rattle, squeeky ball, peek-a-boo etc.), the spinning platform fits baby comfortably, and the matt can be used alone later on. Actually, one can also use the spinning platform alone, with some favourite toys of your little one at hand for him/her. WHAT COULD HAVE BEEN BETTER: the radius of the matt could be a bit bigger, and the matt could perhaps be a bit stiffer or have a more rigid rim to keep it spread (my daughter likes to grab it and pull it towards her, so that all the fabric ends up piled around the spinning platform rather than flat on the floor). Also, if your baby is big, the spinning platform might last until he/she is some 5 months of age at most. However, same critique applies to the older model of Lamaze spinning gym and of these two I would recomend the newer, Sea gym.