Would like to hear from anyone who may have a track cleaning car regarding efficiency and effectiveness.  Thanks.

I recently came across an ad for a 137 piece set called the Bachmann Lightning Express.  Other than showing a loco plus 6 cars, the ad has few details.  I don't see this set in the catalogue or online store.  Is this something new or discontinued?  Anyone have any info?

I've been considering purchasing the Overland Limited set and would appreciate hearing any pros, cons (if any) and suggestions from anyone who has this set.  Thanks.