Had this for about 12 months now, so speaker well and truly run in. Started off using this single cab predominately for smaller type gigs but with FOH support being quite common these days I find myself using this cab more and more in lieu of my 610HLF cab. The Sealed cab really does give each note a pure / punchy / solid definition. Absolutely No Boom. Therefore very easy to hear on stage ( likewise for the drummer ). I leave the casters always in - and contrary to some reports the casters are plenty strong - sure they're not Mesa quality - but what is hey. For such an inexpensive cab, its built like a Roman Aqueduct, freaking solid as. IMPORTANT - if used with an Ampeg head, I'd recommend nothing less than a PF800 head, sealed cabs like a little more oomph.
I've owned one of these bad boys for a couple of years- sounds as cool as it looks. Its extremely light weight, but still gives a well rounded bottom end whilst retaining a nice 'twang'. I've coupled it with a variety of heads: Ampeg, Orange, Fender and Peavey and it always delivers whether at a jam space or a gig. Its the most reliable cab I've owned. The wheels are detachable and the versatility in tone is easily adaptable (I've used both active and passive basses through it).