I would say that it depends on what they are going to replace. Many small shops just replace parts and do not check for other components being in spec and do not have the capabilities to test the trans prior to install. The warranty seems good. But, some remanufactures require the fluid lines and cooler to be flushed or a new radiator installed or an inline filter to be installed for the warranty to be honored. Be sure that if they are not rebuilding it that they do what is necessary to have the warranty honored. I would call around. Also, call a gm dealer and ask how much a GM SERTA rebuild trans goes for. They are rebuilt by GM, all parts are removed and inspected/measured to be sure that they are with in specs, filled with fluid, and hooked up and tested at the factory before shipping and have all the recent updates. I just called GM and asked about a SERTA trans for my 05 yukon xl 4x4. The price is $1549. Most of the trans shops around me charge $500 labor to R&R a trans. Many of the GM dealers around me have started giving major price breaks on labor if you have one installed by them. They are usually within $100 of the local trans shops for the price of a rebuild. Then you know that the entire trans was gone through, rebuilt, updated, and bench tested. If you have the capability of pulling it yourself and having a "bench job" done it will save you a considerable amount of money.