Delta Chelsea is a conveniently located (the airport shuttle service makes a stop at this hotel) and moderately priced hotel with a decent gym with swimming pools (one for adults and one for kids). The hotel also offers several on-site dining options in case you don't feel like going out.
We got a room with 2 doubles for 3 nights through Priceline. Our room was located on the 23rd floor and had a decent view. However, the entire hotel could definitely use some remodeling and freshening up as the wall/carpet/bathroom looked tired.
All in all, Delta Chelsea is an OK hotel with courteous staff. If you are visiting Toronto and planning to be out and about, it might be a good enough choice for accommodation.