I have two thing-o-matics’, they are alright. I use to work with a Dimensions sst machine. I have high hopes for the replicator. I will probably get a replicator too when they drop, I was also looking at the Ultimaker. I wouldn’t say they are low-res, they can do a surprisingly good job with no support material, and they are pretty dependable, the printing resolution depends on the material diameter and the nozzle size. One machine can do .4mm and the other can do like .25mm, the head movement is spot on. There is a good google group for makerbots btw.