I have one, and I'm not going to be getting rid of it too soon.
Like all Trace Elliots, it's quite a transparent tone, lets the bass shine through, compared to the likes of an SVT that colours the tone a lot. To my ears, it works well with a Stingray.
It's only 300W when it's operating at 4 ohms, you get around 200W by itself. I've added a 1x15" extension to mine, which also helps with the low end.
If it's the 7210H (came onto the market June '00) rather than the slightly earlier 7210SMC (early '98), you're getting an amp that was designed while Gibson owned the company. Some people are of the opinion that post-Gibson Trace Elliots are of inferior quality. You should not worry about this. At all.
In the mid to late '90s there was a problem with the reliability of some Mosfet bass amps, caused by the use of an inappropriate component. This caused intermittent problems that might surface with certain models. However, the model you're thinking about should be free of this as it was picked up fairly quickly (1000s of the amps had shipped by then though). Trace also had a problem with an otherwise great little tube guitar amp called the Vellocette that caused its output transformer to short circuit after a number of hours of use. These two problems caused a fair bit of damage to Trace's reputation.
According to Andy Ewan, who worked for Trace Elliot R&D for 15 years, the pro gear that Trace Elliot produced in their latter years is without doubt the best gear they produced.