I have 4 of them 2 santa fe ac4400 an 1 csx sd40-2 and a cnw ac4400 I'm not a rivet counter so to me i think there great they have better detail them athaern blue box they run great they are a little hard to program to run with other dcc units but can be done I have the 2 santa fe engine mu witha kato ac4400 with a digatrax 123 decoder in it the csx sd40-2 I've got it set to run with a broadway limited some times you know like a lease engine. Some people say if you change the decoders out and put in a digatrax or a nce decoder they run even better I don't know to me thats a wast of money. they pull great the one I have will pull up to 50 cars that weigh about 4oz ea and i have 2 3% grade on my layout. To me there a great buy for people that don't have a lot of money to spend on there railroad. [I'm trying to get the money up for a bachmann spectrum santafe 2-10-2 they sell at the hobby shop for about 159.95dollars an they are going on ebay for about 78.00 good buy]
ps. i just got one for 16.00 dollars. off ebay