Grace company provides support and is very good about it. I have a q'nique 21 after having a Handiquilter 16 for 8 years. Loved the HQ16, but needed to upgrade from the pcquiter computerized system. The cost - just to add a new computerized system was too large. Q'nique, with computerized system was larger throat and not far off of the cost of just adding the ProStitcher to the HQ16, so I went with Q'nique.
I am happy with it so far. Have had some minor tension issues, but so far it has been operator error. I did purchase a second bobbin case because I was having difficulties with bottom tension that no amount of finagling the top tension, the sandwich, etc. would resolve. (I had dropped the bobbin case several times, so that might be attributable to operator error, too.) Tension is much better since that purchase.