If you read back through archived posts, you'll find a lot of folks pleased with Thor, and some not so much. If you go to other company forums, you'll find more or less similar results. More of the satisfaction (or lack of same) is from the dealer, the prep the dealer does before the PDI and handing you the keys, and the service after the sale.
With more sophisticated and complicated systems comes with more technical problems. Part of the appeal of the Vegas/Axis to me is that the slide outs are mostly lighter, and there is no moving step apparatus. We downsized from a 33' Class A, and found we didn't need as much stuff and room. Your results will vary.
If all else fails, read the directions!!