The forward has this month helped Montpellier into the Heineken Cup quarter-finals, scoring a try in a crucial win over Sale, as well as gaining his first international call-up for 18 months.
Beattie told Press Association Sport: "It's been great fun. I have loved the change of environment and the change of culture, and the change in rugby has been great for me. I'm really glad I made the move and also managed to keep in touch with the national set-up and still be asked back."
The 27-year-old was back in Glasgow as Scotland interim head coach Scott Johnson gathered an extended squad for a three-day training camp ahead of the RBS 6 Nations opener against England at Twickenham on February 2.
Beattie, who was last involved in the warm-up matches before being left out of the 2011 World Cup squad, believes improved confidence has been the most important outcome of his move after falling out of favour at Glasgow.
He added: "I haven't played as many games back to back for a long, long time. I have played 80 minutes for the past eight or nine games.
"That has really helped just get back into the run of things, continuity in the legs, going through contacts and collisions and building confidence back up. So it has been great in that respect."
The number eight, who impressed in the 2010 Six Nations before undergoing shoulder surgery that summer, added: "I had stayed at one club for eight years and everyone needs a freshen-up and a change every now and again.
"You have to expose yourself to as many different environments as you can to learn in as many different ways as you can. So far it's been great, I have picked up a few things and it's great to play with different players and learn from different coaches."
Beattie realised there was a risk that moving abroad might have damaged his international prospects, but the switch has had the opposite effect. And he added: "You look at the Welsh players in France and a lot of them aren't being asked back to the national camp, so for me it was an enormous relief after playing a few games to get the call to come back."