According to multiple reviews, the F430
seems to be a reliable device. Some users have experienced some problems (parts not sticking to the raft or similar) but, on the whole, it seems to do a good job. Reliably printing with PEEK strongly depends on the grade of PEEK you are using. Also, you must pay attention to the temperature settings of both the chamber, the extruder and build plate.
The F430 can't reach the highest temperature. That's why you'll need a quality support material for a good adhesion and effective cooling of the material, in order to print it amorphous.
CreatBot also offers a valid budget alternative for printing with PEEK, the F160
. It is a single-extrusion device, which costs half the price of the F430. Its print bed seems to reach a higher temperature of 130°C ( instead of 100°C).