The fact that LAVO holds a 3.5 rating right now goes to show you that Las Vegas is officially the food capital of the world.
From the classy interior (including a second floor old-timey casino lounge) to the outrageously attentive service to the delicious Italian food (appetizers through espresso)...LAVO would absolutely be your all-time favorite Italian place if it (and you) were back in the suburbs of Ohio or Tennessee or wherehaveyou.
As it is, LAVO has to compete with dozens of other top-shelf options within walking distance and that's where you went wrong. VEGAS HAS SPOILED YOU.
Though LAVO is roomey enough to easily accommodate large groups, I had a very small group sit down in a nice corner and enjoyed a brilliant 3-course meal where nothing we ate was less than excellent. The espresso and tiramisu deserve special recognition as there is no letting the foot off the pedal where many places leave dessert as an afterthought. Again, this was truly delicious from start to end.
I've walked by this place many a time without even considering going in. If there's any downside it's that its location is so obvious it's kind of hidden in plain sight, but absolutely do not overlook this additional Italian GEM on the strip.
Also, this place is a fantastic litmus test for your date. If he/she is turning his/her nose up at LAVO then I ain't sayin' (s)he a gold digger...