diff --git a/zenoh/src/prelude.rs b/zenoh/src/prelude.rs
index 850148f506..e2327c0dcc 100644
--- a/zenoh/src/prelude.rs
+++ b/zenoh/src/prelude.rs
@@ -61,9 +61,10 @@ pub(crate) mod common {
     pub use crate::publication::PublisherDeclarations;
     pub use zenoh_protocol::core::{CongestionControl, Reliability, WhatAmI};
 
-    pub use crate::sample::builder::{
-        QoSBuilderTrait, SampleBuilderTrait, TimestampBuilderTrait, ValueBuilderTrait,
-    };
+    pub use crate::sample::builder::{QoSBuilderTrait, TimestampBuilderTrait, ValueBuilderTrait};
+
+    #[zenoh_macros::unstable]
+    pub use crate::sample::builder::SampleBuilderTrait;
 }
 
 /// Prelude to import when using Zenoh's sync API.
diff --git a/zenoh/src/queryable.rs b/zenoh/src/queryable.rs
index c2fd67fcf4..6fbb4e9090 100644
--- a/zenoh/src/queryable.rs
+++ b/zenoh/src/queryable.rs
@@ -18,13 +18,12 @@ use crate::encoding::Encoding;
 use crate::handlers::{locked, DefaultHandler};
 use crate::net::primitives::Primitives;
 use crate::prelude::*;
-use crate::sample::builder::SampleBuilder;
 use crate::sample::{QoSBuilder, SourceInfo};
 use crate::Id;
 use crate::SessionRef;
 use crate::Undeclarable;
 #[cfg(feature = "unstable")]
-use crate::{query::ReplyKeyExpr, sample::Attachment};
+use crate::{query::ReplyKeyExpr, sample::builder::SampleBuilder, sample::Attachment};
 use std::fmt;
 use std::future::Ready;
 use std::ops::Deref;
@@ -98,6 +97,18 @@ impl Query {
         self.inner.value.as_ref()
     }
 
+    /// This Query's payload.
+    #[inline(always)]
+    pub fn payload(&self) -> Option<&Payload> {
+        self.inner.value.as_ref().map(|v| &v.payload)
+    }
+
+    /// This Query's encoding.
+    #[inline(always)]
+    pub fn encoding(&self) -> Option<&Encoding> {
+        self.inner.value.as_ref().map(|v| &v.encoding)
+    }
+
     #[zenoh_macros::unstable]
     pub fn attachment(&self) -> Option<&Attachment> {
         self.inner.attachment.as_ref()
diff --git a/zenoh/src/sample/builder.rs b/zenoh/src/sample/builder.rs
index 5fab36617d..fca55edd09 100644
--- a/zenoh/src/sample/builder.rs
+++ b/zenoh/src/sample/builder.rs
@@ -15,11 +15,8 @@
 use std::marker::PhantomData;
 
 #[cfg(feature = "unstable")]
-use crate::sample::Attachment;
-use crate::sample::QoS;
-use crate::sample::QoSBuilder;
-#[cfg(feature = "unstable")]
-use crate::sample::SourceInfo;
+use crate::sample::{Attachment, SourceInfo};
+use crate::sample::{QoS, QoSBuilder};
 use crate::Encoding;
 use crate::KeyExpr;
 use crate::Payload;
@@ -47,6 +44,7 @@ pub trait TimestampBuilderTrait {
     fn timestamp<T: Into<Option<Timestamp>>>(self, timestamp: T) -> Self;
 }
 
+#[zenoh_macros::unstable]
 pub trait SampleBuilderTrait {
     /// Attach source information
     #[zenoh_macros::unstable]
diff --git a/zenoh/src/session.rs b/zenoh/src/session.rs
index d9427f270c..67bec5f488 100644
--- a/zenoh/src/session.rs
+++ b/zenoh/src/session.rs
@@ -41,6 +41,7 @@ use crate::Priority;
 use crate::Sample;
 use crate::SampleKind;
 use crate::Selector;
+#[cfg(feature = "unstable")]
 use crate::SourceInfo;
 use crate::Value;
 use log::{error, trace, warn};
diff --git a/zenoh/tests/qos.rs b/zenoh/tests/qos.rs
index 5fd3edd985..1885c316ea 100644
--- a/zenoh/tests/qos.rs
+++ b/zenoh/tests/qos.rs
@@ -13,7 +13,6 @@
 //
 use std::time::Duration;
 use zenoh::prelude::r#async::*;
-use zenoh::sample::builder::QoSBuilderTrait;
 use zenoh::{publication::Priority, SessionDeclarations};
 use zenoh_core::ztimeout;
 
diff --git a/zenoh/tests/routing.rs b/zenoh/tests/routing.rs
index 1031630a68..56bacd7fdd 100644
--- a/zenoh/tests/routing.rs
+++ b/zenoh/tests/routing.rs
@@ -18,7 +18,6 @@ use std::time::Duration;
 use tokio_util::{sync::CancellationToken, task::TaskTracker};
 use zenoh::config::{Config, ModeDependentValue};
 use zenoh::prelude::r#async::*;
-use zenoh::sample::builder::QoSBuilderTrait;
 use zenoh::Result;
 use zenoh_core::ztimeout;
 use zenoh_protocol::core::{WhatAmI, WhatAmIMatcher};