Bath/surround liners? Any experience - good/bad? Cost?

[Andrew S.]

Tenants just reported major peeling of a previous re-glaze on tub and tiles and water infiltration into the wall.  Its an old cast iron tub with ceramic tile surround that was re-glazed a few years ago.  I'm considering a liner (bathfitters, re-bath, luxury bath) instead of tearing out everything and re-building, mainly because this is the only bath in the house and I would like to avoid having to put up the tenants in a hotel.

Does anyone have experience with such products?  What should I expect to pay for a tub/surround liner?  

Any input appreciated!