Looking for recommendations for good mud boots that are comfortable and will hold up. I used to get the cheap rubber ones from TSC but they eventually crack and start to leak. The last ones I got from TSC were GREAT, super comfortable, but now they leak too :( 

I would like some that would last more than a year or two, or is it normal to have to replace them pretty regularly? I don't want to invest in more expensive boots if they're just going to break down as quick as the cheap ones.

Get Muck Boots.  They are more expensive, but the best investment ever!!!!  Plus they keep your feet warm in the winter too.

These are all I wear, so comfy and will last, during winter I have them on all the time..

Go to Riding WareHouse they got some mud boots on clearance

The Muck Boot 100%%