Take this with a grain of salt as opinions and tastes differ and buying sight unseen is a crap shoot ... I have a Dillion semi hollow. It's a well made import. The pots are standard, import stuff. The stock pickups aren't bad (G&B). The bridge is a Wilkinson wrap around. Big and ugly, but the quality is decent. Grover machines. Frets are level and very nicely crowned and polished ... better than average for sure. I haven't played it for a while but I think the nut is bone. At any rate, it's well cut. It's a good guitar for the money. It doesn't get played much as I'm not fond of the neck. I've played a couple others and my impressions were mostly positive. I've read mostly positive as well but there have been some negatives. The Phoenix is a popular choice for a Firebird copy but I've never played one. I'm sure there are good, decent and bad examples as usually happens with imports. If I wanted one, and the price was good, I'd take chance and buy one, unseen, based on my experience with the brand, albeit fairly limited. But as with every guitar, I'd much rather have hands on, first.
One more thing, my personal opinion is that Dillion guitars are overpriced now.