covad sucks donkey ba....um yea
I depending on where you live you might not want to get covad, i got a friend that works for an ISP that does its dsl thru covad...it is always going down it seems, not very reliable at all. check
DSLreports to find out how service is in your area.
Also CLECs (like covad) are generally more expensive that the ILECs (like SwBell, PacBell, etc) because they have to "rent" the equipment from the ILEC thus have to charge more to make a profit...