I have a BTB 555 (My Avatar) and it is a great instrument. Quality wise it's a few steps up from Ibby's 300 series. It has Bart MK1's in it and the wood is a little nicer. Mine is a Mahogany body, Maple top and back with a thin sandwich of walnut between the Maple and Mahogany. The neck plays quite well and I haven't even gotten around to leveling and dressing the frets (which I plan to do soon). The neck on mine (a fiver) is quite wide, But I like it and in fact now have a BTB456. It was actually easy for me to get used to.
Cirrus 5, Fury, MTD Kingston Artist, ATK 305, BTB 555, BTB 456, Cort B5, G&L JB2, Brubaker Brute
TC BH500, Carvin BRX 2.10, Zoom B3
USA Peavey Club #247