From what I've read it's a good "niche" seat but not the best for every day use. Here's a pretty thorough assessment from a certified Child Passenger Safety Tech whom I've found to be very helpful and well informed on child safety seat installation, selection, and use:
http://carseatblog.com/403/safeguard-go-review-hybrid-boo...
what are the current ages and sizes of your children? the forums at http://www.car-seat.org have a lot of helpful and knowledgeable folks, many of whom are certified techs, who can give you a lot of good options to fit your children, vehicle, and budget.
BTW the absence of lower LATCH anchors shouldn't affect which seat to get, as all current child safety seats are designed so that they can be installed with the vehicle seat belt *or* the LATCH system - although the LATCH system was intended to simplify car seat installation, it doesn't make installations inherently safer.