It's a neat little unit. The grinder is basically a 'lux' and has the same internals as the Isomac professionale and a lot of other little conical Burr grinders
It heats up really quickly and ready to go on a whim.
My brother has the lelit and it makes great milk based drinks. At work I have a Nemox Napoletana which is basically a re-badged cheaper version and it performs well.
Cons include noisy grinder, but most grinders are at this price, and grind retention is high due to the chute. The little boiler may not be the best for the subtleties of an espresso lover, but with milk drinks it reliably creates good results.
Having the grinder internal may have concerns regarding heat stress to the beans in the hopper, but single dosing the grinder can often be inconsistent due to retention.