I have the HQ 16 and I think it is a heavy duty machine. I also purchased the heavy duty studio frame, which can be changed from 6 to 12 foot. I also have the stitch regulator, laser light and groovy boards. I think the machine is very smooth handling. I purchased mine from Quilt Trends (QuiltTrends.com)and got the best price from them. I believe they are located in Ohio. They brought the machine (table was delivered) to my home, set up the frame and machine and gave me a demonstration on usuage. There was no charge for them coming to my home. They are very nice to work with.