I have tried three different ones over the years so here is my take.
First is the one made by Northeast Trains. Works well due to a lot of friction and rubbing of the cleaning pads on the rails. These sell for $89. Only negative is changing the cleaning pads is awkward. Need three hands. Northeast Trains
Second is the Centerline car. This car is about $120. It also works okay but the cleaning pads are rolling free and frankly they do not apply enough pressure on the rails to get them really clean.
Third is this one which was being sold through Weaver but I believe it can be purchased directly from MNP This one is very expensive (around $175) but the design would suggest it would do a very good job cleaning the track. It does but we had problems with it because the cleaning pads would occasionally get caught going over the switches (Ross) and the car would derail. As is always the case, the derailments would happen at the most difficult spot to reach on the layout
On balance, if I were to start over, I would go with the Northeast trains car. I don't think the other two do that much of a better job to justify the added cost.
